CVE-2026-8134 Concrete CMS 9.5.0 and below is vulnerable to Authenticated RCE via Composer customTemplate Path Traversal leading to PHP File Inclusion

Concrete CMS 9.5.0 and below fails to sanitize path traversal sequences in the ptComposerFormLayoutSetControlCustomTemplate field when saving page type composer form layouts. An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable file...

CVE-2026-8134 Concrete CMS 9.5.0 and below is vulnerable to Authenticated RCE via Composer customTemplate Path Traversal leading to PHP File Inclusion

Concrete CMS 9.5.0 and below fails to sanitize path traversal sequences in the ptComposerFormLayoutSetControlCustomTemplate field when saving page type composer form layouts. An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable file...

CVE-2026-8134 Concrete CMS 9.5.0 and below is vulnerable to Authenticated RCE via Composer customTemplate Path Traversal leading to PHP File Inclusion

Concrete CMS 9.5.0 and below fails to sanitize path traversal sequences in the ptComposerFormLayoutSetControlCustomTemplate field when saving page type composer form layouts. An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable file...

EUVD-2026-31335

Concrete CMS 9.5.0 and below fails to sanitize path traversal sequences in the ptComposerFormLayoutSetControlCustomTemplate field when saving page type composer form layouts. An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable file...

CVE-2026-8134

Concrete CMS 9.5.0 and earlier fails to sanitize path traversal in the ptComposerFormLayoutSetControlCustomTemplate field when saving page-type composer form layouts. An authenticated rogue administrator with composer form editing rights can cause arbitrary readable files to be included on the se...

CVE-2026-8134

Concrete CMS 9.5.0 and below fails to sanitize path traversal sequences in the ptComposerFormLayoutSetControlCustomTemplate field when saving page type composer form layouts. An authenticated rogue administrator with composer form editing rights can exploit this to include arbitrary readable file...

GHSA-2QJJ-H6WP-C7H7 Umbraco.Cms: Open Redirect Vulnerability in Surface Controllers

Impact Some of the Surface Controllers in the CMS provide to support member related operations fail to validate redirect URLs, making Razor templates that derive 'RedirectUrl' from user-controlled query parameters vulnerable to malicious redirect attacks. Patches The issue is resolved in versions...

Umbraco.Cms: Open Redirect Vulnerability in Surface Controllers

Impact Some of the Surface Controllers in the CMS provide to support member related operations fail to validate redirect URLs, making Razor templates that derive 'RedirectUrl' from user-controlled query parameters vulnerable to malicious redirect attacks. Patches The issue is resolved in versions...

Concrete CMS security vulnerabilities

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier have security vulnerabilities. These vulnerabilities stem from the fact that the actiongetevents function in the calendar block does not check the canView permissions of...

PT-2026-42545

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier Description An authorization bypass exists in the Calendar Block. The function action get events fails to verify the canView permission on the calendar, which allows the disclosure of restricted event...

Concrete CMS cross-site scripting vulnerabilities

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier had a cross-site scripting vulnerability. This vulnerability stemmed from the controller not verifying or cleaning the height parameter, which could lead to storage-based...

PT-2026-42543

Concrete CMS 9.5.0 and below has Stored XSS on the height parameter. The controller does not validate or sanitize $height. Any user with editor privileges can inject malicious JavaScript that executes in the context of any visitor's browser, potentially leading to session hijacking, credential...

Concrete CMS Cross-Site Request Forgery Vulnerability

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier had a cross-site request forgeing vulnerability. This vulnerability occurred due to the lack of validation of the CSRF token before processing requests like...

Concrete CMS cross-site scripting vulnerabilities

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier had a cross-site scripting vulnerability. This vulnerability stemmed from an exploit of the updateCollectionAliasExternal function, which allowed for bypassed cleanup...

Concrete CMS cross-site scripting vulnerabilities

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier had a cross-site scripting vulnerability. This vulnerability occurred due to the OAuth integration name being rendered using the t translation assistant. As a result, the...

CVE-2026-8197: Improper Neutralization of Input During Web Page Generation

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via OAuth integration name. The OAuth authorize template renders the integration name admin-controlled through Concrete's t translation helper as a sprintf-style format. The ... wrap is built by PHP string interpolation before t runs, so th...

PT-2026-42542

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via OAuth integration name. The OAuth authorize template renders the integration name admin-controlled through Concrete's t translation helper as a sprintf-style format. The ... wrap is built by PHP string interpolation before t runs, so th...

Concrete CMS security vulnerabilities

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions prior to Concrete CMS 9.5.0 contained security vulnerabilities. These vulnerabilities stemmed from the User Profile Editing controller, which passed the entire original POST array to UserInfo::update...

CVE-2026-8432: Cross-Site Request Forgery (CSRF)

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/backend/file star. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Dror...

CVE-2026-8245: Improper Neutralization of Script in Attributes in a Web Page

Concrete CMS 9.5.0 and below is vulnerable to Reflected XSS in Legacy Pagination via HTML attribute injection. Concrete\Core\Legacy\Pagination builds pagination links by raw-interpolating its $URL field into href="" . Any authenticated admin or report viewer with access to...