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CVE archive

April 2021

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

Showing 50 of 2026 matching CVEs · Page 3 of 41.

High · CVSS 8.8 · CISA KEV

CVE-2021-3493: The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces...

The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.

Published Apr 17, 2021 · Updated Oct 21, 2025

Critical · CVSS 10 · CISA KEV

CVE-2021-22893: Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed...

Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Browser and Pulse Secure Collaboration features of Pulse Connect Secure that can allow an unauthenticated user to perform remote arbitrary code execution on the Pulse Connect Secure gateway. This vulnerability has been exploited in the wild.

Published Apr 23, 2021 · Updated Oct 21, 2025

Medium · CVSS 4.3

CVE-2021-22890: curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a co...

curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.

Published Apr 1, 2021 · Updated Jun 9, 2025

Medium · CVSS 5.3

CVE-2021-22876: curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unau...

curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.

Published Apr 1, 2021 · Updated Jun 9, 2025

Medium · CVSS 6.1

CVE-2021-25926: In SiCKRAGE, versions 9.3.54.dev1 to 10.0.11.dev1 are vulnerable to Reflected Cross-Site-Scripting (XSS) du...

In SiCKRAGE, versions 9.3.54.dev1 to 10.0.11.dev1 are vulnerable to Reflected Cross-Site-Scripting (XSS) due to user input not being validated properly in the `quicksearch` feature. Therefore, an attacker can steal a user's sessionID to masquerade as a victim user, to carry out any actions in the context of the user.

Published Apr 12, 2021 · Updated Apr 30, 2025

High · CVSS 8.1

CVE-2021-47663: Improper session handling

Due to improper JSON Web Tokens implementation an unauthenticated remote attacker can guess a valid session ID and therefore impersonate a user to gain full access.

Published Apr 24, 2025 · Updated Apr 24, 2025

High · CVSS 7.8

CVE-2021-21094: Adobe Bridge PDF File Parsing Out-Of-Bounds Write vulnerability could lead to arbitrary code execution

Adobe Bridge versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by an Out-of-bounds write vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

Medium · CVSS 5.5

CVE-2021-21096: Adobe Bridge Genuine Software Service Incorrect Permission Assignment could lead to Denial-of-Service

Adobe Bridge versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by an Improper Authorization vulnerability in the Genuine Software Service. A low-privileged attacker could leverage this vulnerability to achieve application denial-of-service in the context of the current user. Exploitation of this issue does not require user interaction.

Published Apr 15, 2021 · Updated Apr 23, 2025

High · CVSS 7.8

CVE-2021-21100: Adobe Digital Editions Arbitrary file system write vulnerability

Adobe Digital Editions version 4.5.11.187245 (and earlier) is affected by a Privilege Escalation vulnerability during installation. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary file system write in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

High · CVSS 7.8

CVE-2021-21093: Adobe Bridge SGI File Parsing Memory Corruption vulnerability could lead to arbitrary code execution

Adobe Bridge versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by a memory corruption vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

High · CVSS 7.8

CVE-2021-21095: Adobe Bridge TTF Font Parsing Out-Of-Bounds Write vulnerability could lead to arbitrary code execution

Adobe Bridge versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by an Out-of-bounds write vulnerability when parsing a crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

High · CVSS 7.8

CVE-2021-28549: Adobe Photoshop parsing JS buffer overflow vulnerability could lead to arbitrary code execution

Adobe Photoshop versions 21.2.6 (and earlier) and 22.3 (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted JSX file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

Low · CVSS 3.3

CVE-2021-21091: Adobe Bridge HEIC File Parsing Out-Of-Bounds Read vulnerability could lead to information disclosure

Adobe Bridge versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by an Out-of-bounds read vulnerability when parsing a crafted file. An unauthenticated attacker could leverage this vulnerability to disclose sensitive memory information in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

High · CVSS 7.8

CVE-2021-21092: Adobe Bridge DCM File Parsing Memory Corruption could lead to arbitrary code execution

Adobe Bridge versions 10.1.1 (and earlier) and 11.0.1 (and earlier) are affected by a memory corruption vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

Medium · CVSS 5.4

CVE-2021-21087: ColdFusion Improper neutralization of web input during page generation could lead to arbitrary JavaScript execution in the browser

Adobe Coldfusion versions 2016 (update 16 and earlier), 2018 (update 10 and earlier) and 2021.0.0.323925 are affected by an Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability. An attacker could abuse this vulnerability to execute arbitrary JavaScript code in context of the current user. Exploitation of this issue requires user interaction.

Published Apr 15, 2021 · Updated Apr 23, 2025

High · CVSS 7.8

CVE-2021-28548: Adobe Photoshop parsing JS buffer overflow vulnerability could lead to arbitrary code execution

Adobe Photoshop versions 21.2.6 (and earlier) and 22.3 (and earlier) are affected by a Buffer Overflow vulnerability when parsing a specially crafted JSX file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Published Apr 15, 2021 · Updated Apr 23, 2025

Medium · CVSS 6.5

CVE-2021-21070: Privilege Escalation Vulnerability in Adobe RoboHelp

Adobe Robohelp version 2020.0.3 (and earlier) is affected by an uncontrolled search path element vulnerability that could lead to privilege escalation. An attacker with admin permissions to write to the file system could leverage this vulnerability to escalate privileges.

Published Apr 19, 2021 · Updated Apr 23, 2025

Critical · CVSS 9.3

CVE-2021-41161: XSS in csvimport in 3.0.0-beta versions

Combodo iTop is a web based IT Service Management tool. In versions prior to 3.0.0-beta6 the export CSV page don't properly escape the user supplied parameters, allowing for javascript injection into rendered csv files. Users are advised to upgrade. There are no known workarounds for this issue.

Published Apr 21, 2022 · Updated Apr 23, 2025

Critical · CVSS 9.3

CVE-2021-41162: Cross-site Scripting in Combodo iTop

Combodo iTop is a web based IT Service Management tool. In 3.0.0 beta releases prior to beta6 the `ajax.render.php?operation=wizard_helper` page did not properly escape the user supplied parameters, allowing for a cross site scripting attack vector. Users are advised to upgrade. There are no known workarounds for this issue.

Published Apr 21, 2022 · Updated Apr 23, 2025

Medium · CVSS 6.5

CVE-2021-41245: Possible Cross-Site Request Forgery in Combodo iTop

Combodo iTop is a web based IT Service Management tool. In versions prior to 2.7.6 and 3.0.0, CSRF tokens generated by `privUITransactionFile` aren't properly checked. Versions 2.7.6 and 3.0.0 contain a patch for this issue. As a workaround, use the session implementation by adding in the iTop config file.

Published Apr 5, 2022 · Updated Apr 22, 2025

Medium · CVSS 5.3

CVE-2021-41119: DoS vulnerabiliity in wire-server json parser

Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. There are no known workarounds for this issue.

Published Apr 13, 2022 · Updated Apr 22, 2025

Unknown · CVSS Not scored

CVE-2021-25094: Tatsu < 3.3.12 - Unauthenticated RCE

The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", this can bypass extension control implemented in the plugin. Moreover, there is a race condition in the zip extraction process which makes the shell file live long enough on the filesystem to be callable by an attacker.

Published Apr 25, 2022 · Updated Apr 21, 2025

High · CVSS 7.5

CVE-2021-40368: A vulnerability has been identified in SIMATIC S7-400 CPU 412-1 DP V7 (All versions), SIMATIC S7-400 CPU...

A vulnerability has been identified in SIMATIC S7-400 CPU 412-1 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414-2 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 DP V7 (All versions), SIMATIC S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 414F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416-2 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 DP V7 (All versions), SIMATIC S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 416F-2 DP V7 (All versions), SIMATIC S7-400 CPU 416F-3 PN/DP V7 (All versions < V7.0.3), SIMATIC S7-400 CPU 417-4 DP V7 (All versions), SIMATIC S7-400 H V6 CPU family (incl. SIPLUS variants) (All versions < V6.0.10), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions < V10.1), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions < V8.2.3), SIPLUS S7-400 CPU 414-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 PN/DP V7 (All versions < V7.0.3), SIPLUS S7-400 CPU 416-3 V7 (All versions), SIPLUS S7-400 CPU 417-4 V7 (All versions). Affected devices improperly handle specially crafted packets sent to port 102/tcp. This could allow an attacker to create a Denial-of-Service condition. A restart is needed to restore normal operations.

Published Apr 12, 2022 · Updated Apr 21, 2025

High · CVSS 8.5

CVE-2021-32960: Rockwell Automation FactoryTalk Services Platform Protection Mechanism Failure

Rockwell Automation FactoryTalk Services Platform v6.11 and earlier, if FactoryTalk Security is enabled and deployed contains a vulnerability that may allow a remote, authenticated attacker to bypass FactoryTalk Security policies based on the computer name. If successfully exploited, this may allow an attacker to have the same privileges as if they were logged on to the client machine.

Published Apr 1, 2022 · Updated Apr 17, 2025

Medium · CVSS 6.1

CVE-2021-27493: Philips Vue PACS

Philips Vue PACS versions 12.2.x.x and prior does not ensure or incorrectly ensures structured messages or data are well formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.

Published Apr 1, 2022 · Updated Apr 17, 2025

High · CVSS 7.2

CVE-2021-32981: AVEVA System Platform Path Traversal

AVEVA System Platform versions 2017 through 2020 R2 P01 uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Published Apr 4, 2022 · Updated Apr 16, 2025

Critical · CVSS 9

CVE-2021-43932: Elcomplus SmartPtt Cross-site Scripting

Elcomplus SmartPTT is vulnerable when an attacker injects JavaScript code into a specific parameter that can executed upon accessing the dashboard or the main page.

Published Apr 28, 2022 · Updated Apr 16, 2025

High · CVSS 8.8

CVE-2021-43939: Elcomplus SmartPtt Improper Authorization

Elcomplus SmartPTT is vulnerable when a low-authenticated user can access higher level administration authorization by issuing requests directly to the desired endpoints.

Published Apr 28, 2022 · Updated Apr 16, 2025