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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 22591 matching CVEs · Page 8 of 452.

Medium · CVSS 6.1

CVE-2021-4195: XSS in Firmanet Software and Technology Customer Relation Manager

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Firmanet Software and Technology Customer Relation Manager allows XSS Targeting HTML Attributes. This issue affects Customer Relation Manager: before 2022.03.13.

Published Mar 14, 2023 · Updated May 18, 2026

Medium · CVSS 6.5

CVE-2021-45478: IDOR in Yordam Library Automation System

Improper Handling of Parameters vulnerability in Bordam Information Technologies Library Automation System allows Collect Data as Provided by Users. This issue affects Library Automation System: before 19.2.

Published Mar 2, 2023 · Updated May 18, 2026

Medium · CVSS 5.4

CVE-2021-45479: XSS in Yordam Library Automation System

Improper Neutralization of Input During Web Page Generation vulnerability in Yordam Information Technologies Library Automation System allows Stored XSS. This issue affects Library Automation System: before 19.2.

Published Mar 2, 2023 · Updated May 18, 2026

Medium · CVSS 6.5

CVE-2021-45477: IDOR in Yordam Library Automation System

Improper Handling of Parameters vulnerability in Bordam Information Technologies Library Automation System allows Collect Data as Provided by Users. This issue affects Library Automation System: before 19.2.

Published Mar 2, 2023 · Updated May 18, 2026

High · CVSS 8.6

CVE-2021-44793: Information Leakege via Unauthorized Access in Single Connect

Single Connect does not perform an authorization check when using the sc-reports-ui" module. A remote attacker could exploit this vulnerability to access the device configuration page and export the data to an external file. The exploitation of this vulnerability might allow a remote attacker to obtain sensitive information including the database credentials. Since the database runs with high privileges it is possible to execute commands with the attained credentials.

Published Jan 27, 2022 · Updated May 18, 2026

Medium · CVSS 5.3

CVE-2021-44794: Information Leakege via Unauthorized Access in Single Connect

Single Connect does not perform an authorization check when using the "sc-diagnostic-ui" module. A remote attacker could exploit this vulnerability to access the device information page. The exploitation of this vulnerability might allow a remote attacker to obtain sensitive information.

Published Jan 27, 2022 · Updated May 18, 2026

Medium · CVSS 5.3

CVE-2021-44795: Modifying User Permissions via Unauthorized Access in Single Connect

Single Connect does not perform an authorization check when using the "sc-assigned-credential-ui" module. A remote attacker could exploit this vulnerability to modify users permissions. The exploitation of this vulnerability might allow a remote attacker to delete permissions from other users without authenticating.

Published Jan 27, 2022 · Updated May 18, 2026

Medium · CVSS 5.3

CVE-2021-44792: Information Leakege via Unauthorized Access in Single Connect

Single Connect does not perform an authorization check when using the "log-monitor" module. A remote attacker could exploit this vulnerability to access the logging interface. The exploitation of this vulnerability might allow a remote attacker to obtain sensitive information.

Published Jan 27, 2022 · Updated May 18, 2026

High · CVSS 8.8

CVE-2021-3855: Command Injection in Liman Central Management System

Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Liman Central Management System Liman MYS (HTTP/Controllers, CronMail, Jobs modules) allows Command Injection. This issue affects Liman Central Management System: from 1.7.0 before 1.8.3-462.

Published Feb 24, 2023 · Updated May 18, 2026

Critical · CVSS 9.8

CVE-2021-3854: SQLi in Glox Technology's Useroam Hotspot

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Glox Technology Useroam Hotspot allows SQL Injection. This issue affects Useroam Hotspot: before 5.1.0.15.

Published Mar 2, 2023 · Updated May 18, 2026

Critical · CVSS 9.6

CVE-2021-3825: Missing Authorization Checks in LiderAhenk

On 2.1.15 version and below of Lider module in LiderAhenk software is leaking it's configurations via an unsecured API. An attacker with an access to the configurations API could get valid LDAP credentials.

Published Oct 1, 2021 · Updated May 18, 2026

Medium · CVSS 5.3

CVE-2021-3806: Path Traversal in Pardus Software Center

A path traversal vulnerability on Pardus Software Center's "extractArchive" function could allow anyone on the same network to do a man-in-the-middle and write files on the system.

Published Sep 18, 2021 · Updated May 18, 2026

Medium · CVSS 5.3

CVE-2021-47958: CouchCMS 2.2.1 Server-Side Request Forgery via SVG upload

CouchCMS 2.2.1 contains a server-side request forgery vulnerability that allows authenticated attackers to make arbitrary HTTP requests by uploading malicious SVG files. Attackers can upload SVG files containing external entity references through the browse.php endpoint to access internal services and resources.

Published May 15, 2026 · Updated May 15, 2026

High · CVSS 8.8

CVE-2021-47966: PHP Timeclock 1.04 SQL Injection via login.php

PHP Timeclock 1.04 contains time-based and boolean-based blind SQL injection vulnerabilities in the login_userid parameter of login.php that allows unauthenticated attackers to extract database contents. Attackers can submit crafted POST requests with SQL payloads using SLEEP functions or RLIKE conditional statements to dump sensitive database information including employee names and credentials.

Published May 15, 2026 · Updated May 15, 2026

High · CVSS 8.7

CVE-2021-47959: WordPress Plugin WPGraphQL 1.3.5 Denial of Service

WordPress Plugin WPGraphQL 1.3.5 contains a denial of service vulnerability that allows unauthenticated attackers to exhaust server resources by sending batched GraphQL queries with duplicated fields. Attackers can send POST requests to the GraphQL endpoint with amplified field duplication payloads to trigger server out-of-memory conditions and MySQL connection errors.

Published May 15, 2026 · Updated May 15, 2026

Critical · CVSS 9.8

CVE-2021-47965: WordPress Plugin WP Super Edit 2.5.4 Unrestricted File Upload

WordPress Plugin WP Super Edit 2.5.4 and earlier contains an unrestricted file upload vulnerability in the FCKeditor component that allows attackers to upload dangerous file types without validation. Attackers can upload arbitrary files through the filemanager upload endpoint to achieve remote code execution and complete system compromise.

Published May 15, 2026 · Updated May 15, 2026

High · CVSS 8.7

CVE-2021-47749: YouPHPTube <= 7.8 - Directory Traversal

YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to access arbitrary files by manipulating the 'lang' parameter in GET requests. Attackers can exploit the path traversal flaw in locale/function.php to include and view PHP files outside the intended directory by using directory traversal sequences.

Published Jan 13, 2026 · Updated May 14, 2026

Critical · CVSS 9.8

CVE-2021-4473: Tianxin Internet Behavior Management System Command Injection via toQuery.php

Tianxin Internet Behavior Management System contains a command injection vulnerability in the Reporter component endpoint that allows unauthenticated attackers to execute arbitrary commands by supplying a crafted objClass parameter containing shell metacharacters and output redirection. Attackers can exploit this vulnerability to write malicious PHP files into the web root and achieve remote code execution with the privileges of the web server process. This vulnerability has been fixed in version NACFirmware_4.0.0.7_20210716.180815_topsec_0_basic.bin. Exploitation evidence was first observed by the Shadowserver Foundation on 2024-06-01 (UTC).

Published Apr 7, 2026 · Updated May 14, 2026

High · CVSS 8.7

CVE-2021-4463: Longjing Technology BEMS API <= 1.21 Remote Arbitrary File Download

Longjing Technology BEMS API versions up to and including 1.21 contains an unauthenticated arbitrary file download vulnerability in the 'downloads' endpoint. The 'fileName' parameter is not properly sanitized, allowing attackers to craft traversal sequences and access sensitive files outside the intended directory.

Published Nov 12, 2025 · Updated May 14, 2026

Medium · CVSS 4.8

CVE-2021-47870: GetSimple CMS My SMTP Contact Plugin 1.1.2 - Stored XSS

GetSimple CMS My SMTP Contact Plugin 1.1.2 suffers from a Stored Cross-Site Scripting (XSS) vulnerability. The plugin attempts to sanitize user input using htmlspecialchars(), but this can be bypassed by passing dangerous characters as escaped hex bytes. This allows attackers to inject arbitrary client-side code that executes in the administrator's browser when visiting a malicious page.

Published Jan 21, 2026 · Updated May 12, 2026

Unknown · CVSS Not scored

CVE-2021-47316: nfsd: fix NULL dereference in nfs3svc_encode_getaclres

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix NULL dereference in nfs3svc_encode_getaclres In error cases the dentry may be NULL. Before 20798dfe249a, the encoder also checked dentry and d_really_is_positive(dentry), but that looks like overkill to me--zero status should be enough to guarantee a positive dentry. This isn't the first time we've seen an error-case NULL dereference hidden in the initialization of a local variable in an xdr encoder. But I went back through the other recent rewrites and didn't spot any similar bugs.

Published May 21, 2024 · Updated May 12, 2026

Unknown · CVSS Not scored

CVE-2021-47107: NFSD: Fix READDIR buffer overflow

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too small (say, zero), then the buffer size calculation in the new init_dirlist helper functions results in an underflow, allowing the XDR stream functions to write beyond the actual buffer. This calculation has always been suspect. NFSD has never sanity- checked the READDIR count argument, but the old entry encoders managed the problem correctly. With the commits below, entry encoding changed, exposing the underflow to the pointer arithmetic in xdr_reserve_space(). Modern NFS clients attempt to retrieve as much data as possible for each READDIR request. Also, we have no unit tests that exercise the behavior of READDIR at the lower bound of @count values. Thus this case was missed during testing.

Published Mar 4, 2024 · Updated May 12, 2026

Unknown · CVSS Not scored

CVE-2021-47002: SUNRPC: Fix null pointer dereference in svc_rqst_free()

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix null pointer dereference in svc_rqst_free() When alloc_pages_node() returns null in svc_rqst_alloc(), the null rq_scratch_page pointer will be dereferenced when calling put_page() in svc_rqst_free(). Fix it by adding a null check. Addresses-Coverity: ("Dereference after null check")

Published Feb 28, 2024 · Updated May 12, 2026

Unknown · CVSS Not scored

CVE-2021-4090: An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel.

An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this flaw, a local attacker with user privilege may gain access to out-of-bounds memory, leading to a system integrity and confidentiality threat.

Published Feb 18, 2022 · Updated May 12, 2026

High · CVSS 8.7

CVE-2021-47944: memono Notepad 4.2 Denial of Service via Buffer Overflow

memono Notepad 4.2 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character buffers 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 on iOS devices.

Published May 10, 2026 · Updated May 12, 2026

High · CVSS 8.8

CVE-2021-47937: e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme Upload

e107 CMS 2.3.0 contains a remote code execution vulnerability that allows authenticated users with theme installation permissions to execute arbitrary commands by uploading malicious theme files. Attackers can upload a crafted theme package through the theme.php endpoint that deploys a web shell to the e107_themes directory, then execute system commands via the payload.php script.

Published May 10, 2026 · Updated May 12, 2026

High · CVSS 8.8

CVE-2021-47930: Balbooa Joomla Forms Builder 2.0.6 SQL Injection Unauthenticated

Balbooa Joomla Forms Builder 2.0.6 contains an unauthenticated SQL injection vulnerability in the form submission handler that allows remote attackers to execute arbitrary SQL queries. Attackers can send POST requests to the com_baforms component with malicious JSON payloads in the 'id' field parameter to extract sensitive database information.

Published May 10, 2026 · Updated May 12, 2026

Medium · CVSS 6.9

CVE-2021-47946: OpenCart 3.0.3.6 Account Takeover via Cross Site Request Forgery

OpenCart 3.0.3.6 contains a cross-site request forgery vulnerability in the /account/edit endpoint that allows unauthenticated attackers to modify victim account details by tricking users into visiting malicious pages. Attackers can craft CSRF payloads that change victim email addresses and account information, then use password reset functionality to gain unauthorized access to compromised accounts.

Published May 10, 2026 · Updated May 12, 2026

High · CVSS 8.8

CVE-2021-47939: Evolution CMS 3.1.6 Authenticated Remote Code Execution via Module Creation

Evolution CMS 3.1.6 contains a remote code execution vulnerability that allows authenticated users with module creation permissions to execute arbitrary system commands by injecting PHP code into module parameters. Attackers can send POST requests to /manager/index.php with malicious PHP code in the 'post' parameter to create modules that execute arbitrary commands when invoked.

Published May 10, 2026 · Updated May 11, 2026

Medium · CVSS 5.3

CVE-2021-47953: OpenCart 3.0.3.7 Cross-Site Request Forgery via account/password

OpenCart 3.0.3.7 contains a cross-site request forgery vulnerability that allows attackers to change user passwords by sending crafted requests to the account/password endpoint. Attackers can trick authenticated users into submitting hidden forms with new password values in the 'password' and 'confirm' parameters to hijack accounts.

Published May 10, 2026 · Updated May 11, 2026

High · CVSS 8.8

CVE-2021-47943: TextPattern CMS 4.8.7 Remote Code Execution via File Upload

TextPattern CMS 4.8.7 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by uploading malicious PHP files through the file upload functionality. Attackers can upload a PHP shell via the Files section in the content area and execute commands by accessing the uploaded file at /textpattern/files/ with GET parameters passed to the system function.

Published May 10, 2026 · Updated May 11, 2026

Critical · CVSS 9.8

CVE-2021-47936: OpenCATS 0.9.4 Remote Code Execution via Resume Upload

OpenCATS 0.9.4 contains a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary commands by uploading malicious PHP files disguised as resume attachments. Attackers can upload PHP payloads through the careers job application endpoint and execute system commands via POST requests to the uploaded file in the upload directory.

Published May 10, 2026 · Updated May 11, 2026

Critical · CVSS 9.8

CVE-2021-47923: OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie

OpenCart 3.0.3.8 contains a session fixation vulnerability that allows attackers to hijack user sessions by injecting arbitrary values into the OCSESSID cookie. Attackers can set malicious OCSESSID cookie values that the server accepts and maintains, enabling session takeover and unauthorized access to user accounts.

Published May 10, 2026 · Updated May 11, 2026

High · CVSS 8.8

CVE-2021-47928: Opencart TMD Vendor System 3.x Blind SQL Injection via product route

Opencart TMD Vendor System 3.x contains a blind SQL injection vulnerability that allows unauthenticated attackers to extract database information by injecting SQL code through the product_id parameter. Attackers can craft malicious SQL queries using time-based or content-based blind injection techniques to enumerate usernames, emails, and password reset codes from the oc_user table.

Published May 10, 2026 · Updated May 11, 2026

High · CVSS 8.8

CVE-2021-47935: Sentry 8.2.0 Remote Code Execution via Pickle Deserialization

Sentry 8.2.0 contains a remote code execution vulnerability that allows authenticated superusers to execute arbitrary commands by injecting malicious pickle-serialized objects through the audit log entry data parameter. Attackers can submit crafted POST requests to the admin audit log endpoint with base64-encoded compressed pickle payloads in the data field to achieve code execution with application privileges.

Published May 10, 2026 · Updated May 11, 2026

Low · CVSS 3.3

CVE-2021-47671: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path

In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path In es58x_rx_err_msg(), if can->do_set_mode() fails, the function directly returns without calling netif_rx(skb). This means that the skb previously allocated by alloc_can_err_skb() is not freed. In other terms, this is a memory leak. This patch simply removes the return statement in the error branch and let the function continue. Issue was found with GCC -fanalyzer, please follow the link below for details.

Published Apr 17, 2025 · Updated May 11, 2026

High · CVSS 7.8

CVE-2021-47670: can: peak_usb: fix use after free bugs

In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni(). Reordering the lines solves the issue.

Published Apr 17, 2025 · Updated May 11, 2026

High · CVSS 7.8

CVE-2021-47669: can: vxcan: vxcan_xmit: fix use after free bug

In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().

Published Apr 17, 2025 · Updated May 11, 2026

High · CVSS 7.8

CVE-2021-47668: can: dev: can_restart: fix use after free bug

In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.

Published Apr 17, 2025 · Updated May 11, 2026

Medium · CVSS 5.5

CVE-2021-47660: fs/ntfs3: Fix some memory leaks in an error handling path of 'log_replay()'

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix some memory leaks in an error handling path of 'log_replay()' All error handling paths lead to 'out' where many resources are freed. Do it as well here instead of a direct return, otherwise 'log', 'ra' and 'log->one_page_buf' (at least) will leak.

Published Feb 26, 2025 · Updated May 11, 2026

Unknown · CVSS Not scored

CVE-2021-47659: drm/plane: Move range check for format_count earlier

In the Linux kernel, the following vulnerability has been resolved: drm/plane: Move range check for format_count earlier While the check for format_count > 64 in __drm_universal_plane_init() shouldn't be hit (it's a WARN_ON), in its current position it will then leak the plane->format_types array and fail to call drm_mode_object_unregister() leaking the modeset identifier. Move it to the start of the function to avoid allocating those resources in the first place.

Published Feb 26, 2025 · Updated May 11, 2026

Unknown · CVSS Not scored

CVE-2021-47658: drm/amd/pm: fix a potential gpu_metrics_table memory leak

In the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: fix a potential gpu_metrics_table memory leak Memory is allocated for gpu_metrics_table in renoir_init_smc_tables(), but not freed in int smu_v12_0_fini_smc_tables(). Free it!

Published Feb 26, 2025 · Updated May 11, 2026