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CVE archive

2021 CVE Archive

Browse CVE records published in 2021 CVE Archive, with severity, affected products, CWE, KEV, and source-backed vulnerability context.

Showing 50 of 22594 matching CVEs · Page 17 of 452.

Medium · CVSS 6.6

CVE-2021-44832: Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration

Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

Published Dec 28, 2021 · Updated May 29, 2026

Critical · CVSS 10

CVE-2021-41556: sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpr...

sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that can lead to Code Execution. If a victim executes an attacker-controlled squirrel script, it is possible for the attacker to break out of the squirrel script sandbox even if all dangerous functionality such as File System functions has been disabled. An attacker might abuse this bug to target (for example) Cloud services that allow customization via SquirrelScripts, or distribute malware through video games that embed a Squirrel Engine.

Published Jul 28, 2022 · Updated May 29, 2026

Low · CVSS 3.7

CVE-2021-36368: An issue was discovered in OpenSSH before 8.9.

An issue was discovered in OpenSSH before 8.9. If a client is using public-key authentication with agent forwarding but without -oLogLevel=verbose, and an attacker has silently modified the server to support the None authentication option, then the user cannot determine whether FIDO authentication is going to confirm that the user wishes to connect to that server, or that the user wishes to allow that server to connect to a different server on the user's behalf. NOTE: the vendor's position is "this is not an authentication bypass, since nothing is being bypassed.

Published Mar 12, 2022 · Updated May 29, 2026

High · CVSS 7.5

CVE-2021-22788: A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sen...

A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

Published Feb 11, 2022 · Updated May 29, 2026

High · CVSS 7.5

CVE-2021-22787: A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device w...

A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

Published Feb 11, 2022 · Updated May 29, 2026

High · CVSS 7.5

CVE-2021-22785: A CWE-200: Information Exposure vulnerability exists that could cause sensitive information of files locate...

A CWE-200: Information Exposure vulnerability exists that could cause sensitive information of files located in the web root directory to leak when an attacker sends a HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

Published Feb 11, 2022 · Updated May 29, 2026

Medium · CVSS 5.9

CVE-2021-45105: Apache Log4j2 does not always protect from infinite recursion in lookup evaluation

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

Published Dec 18, 2021 · Updated May 29, 2026

Medium · CVSS 5.3

CVE-2021-35556: Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Swing).

Vulnerability in the Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Swing). Supported versions that are affected are Java SE: 7u311, 8u301, 11.0.12, 17; Oracle GraalVM Enterprise Edition: 20.3.3 and 21.2.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Oracle GraalVM Enterprise Edition. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Published Oct 20, 2021 · Updated May 28, 2026

Unknown · CVSS Not scored

CVE-2021-26333: AMD Chipset Driver Information Disclosure Vulnerability

An information disclosure vulnerability exists in AMD Platform Security Processor (PSP) chipset driver. The discretionary access control list (DACL) may allow low privileged users to open a handle and send requests to the driver resulting in a potential data leak from uninitialized physical pages.

Published Sep 21, 2021 · Updated May 28, 2026

High · CVSS 7.5

CVE-2021-22926: libcurl-using applications can ask for a specific client certificate to be used in a transfer.

libcurl-using applications can ask for a specific client certificate to be used in a transfer. This is done with the `CURLOPT_SSLCERT` option (`--cert` with the command line tool).When libcurl is built to use the macOS native TLS library Secure Transport, an application can ask for the client certificate by name or with a file name - using the same option. If the name exists as a file, it will be used instead of by name.If the appliction runs with a current working directory that is writable by other users (like `/tmp`), a malicious user can create a file name with the same name as the app wants to use by name, and thereby trick the application to use the file based cert instead of the one referred to by name making libcurl send the wrong client certificate in the TLS connection handshake.

Published Aug 5, 2021 · Updated May 28, 2026

Medium · CVSS 5.3

CVE-2021-22897: curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the c...

curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single "static" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.

Published Jun 11, 2021 · Updated May 28, 2026

Unknown · CVSS Not scored

CVE-2021-21735: A ZTE product has an information leak vulnerability.

A ZTE product has an information leak vulnerability. Due to improper permission settings, an attacker with ordinary user permissions could exploit this vulnerability to obtain some sensitive user information through the wizard page without authentication. This affects ZXHN H168N all versions up to V3.5.0_EG1T4_TE.

Published Jun 10, 2021 · Updated May 26, 2026

Medium · CVSS 5.4

CVE-2021-47981: Quick.CMS 6.7 Cross-Site Scripting via CSRF to Sliders Form

Quick.CMS 6.7 contains a cross-site scripting vulnerability in the sliders form that allows authenticated attackers to inject malicious scripts by submitting XSS payloads through the sDescription parameter. Attackers can craft CSRF forms targeting the admin.php?p=sliders-form endpoint to execute arbitrary JavaScript in victim browsers when the form is submitted.

Published May 16, 2026 · Updated May 24, 2026

High · CVSS 7.2

CVE-2021-47975: WordPress Plugin WP Learn Manager 1.1.2 Stored XSS

WP Learn Manager 1.1.2 contains a stored cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts through the fieldtitle parameter. Attackers can submit POST requests to the jslm_fieldordering page with XSS payloads in the fieldtitle field to execute arbitrary JavaScript when administrators view the field ordering interface.

Published May 16, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47968: Podcast Generator 3.1 Persistent Cross-Site Scripting via long_description

Podcast Generator 3.1 contains a persistent cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by submitting unfiltered JavaScript code in the long_description parameter. Attackers can inject script tags through episode creation or editing requests to execute arbitrary JavaScript when other users view the episode details.

Published May 15, 2026 · Updated May 24, 2026

Medium · CVSS 6.1

CVE-2021-47967: PHP Timeclock 1.04 Multiple Cross-Site Scripting via Parameters

PHP Timeclock 1.04 contains multiple cross-site scripting vulnerabilities that allow unauthenticated attackers to inject arbitrary JavaScript by manipulating URL paths and POST parameters. Attackers can append malicious payloads to login.php, timeclock.php, audit.php, and timerpt.php endpoints, or inject code through from_date and to_date parameters in report requests to execute scripts in user browsers.

Published May 15, 2026 · Updated May 24, 2026

High · CVSS 7.2

CVE-2021-47963: Anote 1.0 Persistent Cross-Site Scripting Remote Code Execution

Anote 1.0 contains a persistent cross-site scripting vulnerability that allows attackers to execute arbitrary code by injecting malicious payloads into markdown files stored within the application. Attackers can craft malicious markdown files with embedded JavaScript that executes system commands when opened, enabling remote code execution on the victim's computer.

Published May 15, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47962: Savsoft Quiz 5.0 Persistent Cross-Site Scripting via User Settings

Savsoft Quiz 5.0 contains a persistent cross-site scripting vulnerability in the user account settings page that allows authenticated attackers to inject malicious HTML and JavaScript code. Attackers can inject script payloads into user profile fields at the edit_user endpoint, which execute in the browsers of users viewing the affected profile after submission.

Published May 15, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47957: WordPress Plugin Cookie Law Bar 1.2.1 Stored XSS via clb_bar_msg

Cookie Law Bar 1.2.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by submitting unsanitized input to the Bar Message field. Attackers can inject script payloads through the plugin settings page that execute in the browsers of all WordPress users viewing the site, enabling cookie theft and sensitive data exfiltration.

Published May 16, 2026 · Updated May 24, 2026

Medium · CVSS 5.4

CVE-2021-47955: CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

CouchCMS 2.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to execute arbitrary JavaScript by uploading malicious SVG files through the file upload functionality. Attackers can upload SVG files containing embedded script tags to the browse.php endpoint, which are then executed in users' browsers when the files are accessed or previewed.

Published May 16, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47951: WordPress Picture Gallery 1.4.2 Stored XSS via Edit Content URL

WordPress Picture Gallery 1.4.2 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the Edit Content URL field in the Access Control settings. Attackers can enter JavaScript payloads in the plugin options that are stored in the database and executed when the functionality is triggered, enabling session hijacking or credential theft.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47947: Projectsend r1295 Stored Cross-Site Scripting via files-edit.php

Projectsend r1295 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by submitting crafted input in the 'name' parameter of files-edit.php. Attackers can inject JavaScript payloads through the file name field that execute in the browser when the file is viewed by other users, particularly affecting System Administrator users on the Dashboard page.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47931: Exponent CMS 2.6 Multiple Vulnerabilities Stored XSS Authentication

Exponent CMS 2.6 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the Title and Text Block parameters in the text editing endpoint. Attackers can inject iframe payloads with embedded SVG onload events to execute arbitrary JavaScript, and the application also exposes database credentials in responses and lacks brute-force protection on authentication endpoints.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47927: WordPress Plugin WP Symposium Pro 2021.10 Stored XSS via wps_admin_forum_add_name

WordPress Plugin WP Symposium Pro 2021.10 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by exploiting insufficient sanitization of the forum name parameter. Attackers can submit POST requests to the admin setup page with JavaScript payloads in the wps_admin_forum_add_name parameter, which are stored and executed when the forum is accessed.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47926: WordPress Contact Form to Email 1.3.24 Stored XSS

Contact Form to Email 1.3.24 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by creating forms with script tags in the form name field. Attackers can craft form names containing JavaScript code that executes when other logged-in users access the form management page, enabling session hijacking or credential theft.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47924: WordPress Plugin Ultimate Product Catalog 5.8.2 Stored XSS via price

Ultimate Product Catalog 5.8.2 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts through the price parameter. Attackers can submit POST requests to post.php with HTML/JavaScript payloads in the price field to execute arbitrary code when the product is viewed.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47910: WordPress Plugin AccessPress Social Icons 1.8.2 Stored XSS

AccessPress Social Icons 1.8.2 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by entering JavaScript payloads into the 'icon title' field. Attackers can store XSS payloads like image tags with onerror event handlers that execute when the plugin page is viewed, affecting all users who access the plugin interface.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.4

CVE-2021-47907: Rocket LMS 1.1 Persistent Cross-Site Scripting via Support Tickets

Rocket LMS 1.1 contains a persistent cross-site scripting vulnerability in the support ticket module that allows authenticated users to inject malicious script code through the title parameter. Attackers can submit support tickets with embedded HTML/JavaScript payloads that execute in the browsers of other users viewing the message history, enabling session hijacking and phishing attacks.

Published May 10, 2026 · Updated May 24, 2026

Medium · CVSS 6.1

CVE-2021-47836: Markdown Explorer 0.1.1 - Persistent Cross-Site Scripting

Markdown Explorer 0.1.1 contains a cross-site scripting vulnerability that allows attackers to inject malicious code through file uploads and editor inputs. Attackers can upload markdown files with embedded JavaScript payloads to execute remote commands and potentially gain system access.

Published Jan 16, 2026 · Updated May 24, 2026

Medium · CVSS 5.4

CVE-2021-47817: OpenEMR 5.0.2.1 - Remote Code Execution

OpenEMR 5.0.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to inject malicious JavaScript through user profile parameters. Attackers can exploit the vulnerability by crafting a malicious payload to download and execute a web shell, enabling remote command execution on the vulnerable OpenEMR instance.

Published Jan 21, 2026 · Updated May 24, 2026

Medium · CVSS 6.1

CVE-2021-47750: YouPHPTube <= 7.8 - Cross-Site Scripting

YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the redirectUri parameter in the signup page. Attackers can craft special signup URLs with embedded script tags to execute arbitrary JavaScript in victims' browsers when they access the signup page.

Published Jan 13, 2026 · Updated May 24, 2026

Unknown · CVSS Not scored

CVE-2021-46917: dmaengine: idxd: fix wq cleanup of WQCFG registers

In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix wq cleanup of WQCFG registers A pre-release silicon erratum workaround where wq reset does not clear WQCFG registers was leaked into upstream code. Use wq reset command instead of blasting the MMIO region. This also address an issue where we clobber registers in future devices.

Published Feb 27, 2024 · Updated May 23, 2026

Unknown · CVSS Not scored

CVE-2021-46905: net: hso: fix NULL-deref on disconnect regression

In the Linux kernel, the following vulnerability has been resolved: net: hso: fix NULL-deref on disconnect regression Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead. Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().

Published Feb 25, 2024 · Updated May 23, 2026

Medium · CVSS 6.7

CVE-2021-21508: Dell VxRail versions before 7.0.200 contain a Plain-text Password Storage Vulnerability in VxRail Manager.

Dell VxRail versions before 7.0.200 contain a Plain-text Password Storage Vulnerability in VxRail Manager. A sys-admin user may exploit this vulnerability, leading to the disclosure of certain user credentials. The attacker may be able to use the exposed credentials to access the vulnerable application with privileges of the compromised account.

Published May 22, 2026 · Updated May 22, 2026

High · CVSS 8.7

CVE-2021-47969: Color Notes 1.4 Denial of Service via Long Character String

Color Notes 1.4 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350,000 repeated characters and paste it twice into a new note to cause the application to stop responding.

Published May 16, 2026 · Updated May 18, 2026

High · CVSS 8.7

CVE-2021-47971: My Notes Safe 5.3 Denial of Service via Buffer Overflow

My Notes Safe 5.3 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character strings into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash.

Published May 16, 2026 · Updated May 18, 2026

High · CVSS 8.8

CVE-2021-47954: LayerBB 1.1.4 SQL Injection via search_query Parameter

LayerBB 1.1.4 contains an SQL injection vulnerability that allows unauthenticated attackers to manipulate database queries by injecting SQL code through the search_query parameter. Attackers can send POST requests to /search.php with malicious search_query values using CASE WHEN statements to extract sensitive database information.

Published May 16, 2026 · Updated May 18, 2026

High · CVSS 8.7

CVE-2021-47972: Sticky Notes & Color Widgets 1.4.2 Denial of Service

Sticky Notes & Color Widgets 1.4.2 contains a denial of service vulnerability that allows attackers to crash the application by creating notes with excessively long character strings. Attackers can paste large payloads of repeated characters into note fields to trigger application crashes and make the application stop responding.

Published May 16, 2026 · Updated May 18, 2026