CVE-2026-3242

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the Switch Language block. An attacker can execute arbitrary JavaScript code in the context of other users by injecting malicious scripts through this component. Details Cross-site scripting or XSS is a code...

Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave thanks M3dium for reporting...

GHSA-W9QG-CHFH-G3Q9 Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave thanks M3dium for reporting...

CVE-2026-3242

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

CVE-2026-3242

Concrete CMS

CVE-2026-3242 Concrete CMS below 9.4.8 is vulnerable to Stored XSS in the Switch Language block

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

CVE-2026-3242 Concrete CMS below 9.4.8 is vulnerable to Stored XSS in the Switch Language block

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

CVE-2026-3242 Concrete CMS below 9.4.8 is vulnerable to Stored XSS in the Switch Language block

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

PT-2026-22867

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

Concrete CMS security vulnerabilities

Concrete CMS is an open-source content management system designed for teams. Versions of Concrete CMS prior to 9.4.8 contained a security vulnerability. This vulnerability stemmed from a stored-cross-site scripting vulnerability in the Switch Language block, which could allow malicious...

CVE-2026-3242: Improper Neutralization of Input During Web Page Generation

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks M3dium for reporting...

CVE-2025-2970

Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority...

CVE-2025-2970

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CVE-2025-2970

ConcreteCMS (up to 9.3.9) is affected by a cross-site scripting (XSS) flaw in the Switch Language Block Handler. The vulnerability arises from improper handling of the Label argument, enabling an attacker to inject scripts that get executed by end users’ browsers, potentially enabling cookie thef...

PT-2025-13643

Name of the Vulnerable Software and Affected Versions ConcreteCMS versions up to 9.3.9 Description A vulnerability has been found in ConcreteCMS, affecting an unknown function of the component Switch Language Block Handler. The manipulation of the Label argument leads to cross-site scripting. It ...