CVE-2026-18426 Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

CVE-2026-18426 Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

CVE-2026-81925 Concrete CMS below 9.5.3 is vulnerable to Reflected Cross-Site Scripting (XSS) via Conversation Custom Date Format

Concrete CMS before 9.5.3 improperly neutralized a user-supplied custom date format when rendering conversation messages, resulting in reflected cross-site scripting. An attacker could execute arbitrary JavaScript in the browser of a user who was tricked into submitting a crafted POST request to...

CVE-2026-81925 Concrete CMS below 9.5.3 is vulnerable to Reflected Cross-Site Scripting (XSS) via Conversation Custom Date Format

Concrete CMS before 9.5.3 improperly neutralized a user-supplied custom date format when rendering conversation messages, resulting in reflected cross-site scripting. An attacker could execute arbitrary JavaScript in the browser of a user who was tricked into submitting a crafted POST request to...

CVE-2026-81925

Concrete CMS versions before 9.5.3 contain a reflected cross-site scripting (XSS) vulnerability in the conversation view endpoint . A user-supplied custom date format was improperly neutralized when rendering conversation messages, allowing an attacker to execute arbitrary JavaScript in a victim'...

CVE-2026-18425

Concrete CMS 9 (versions 9.0.0 through 9.5.2) contains an IDOR flaw in the dashboard sitemap reorder action (SitemapUpdate::updateDisplayOrder). The controller checks only the global access_sitemap task permission and omits any per-page edit permission check, allowing an authenticated user with s...

CVE-2026-18425 IDOR in Concrete CMS 9.0.0 through 9.5.2 dashboard sitemap reorder (SitemapUpdate::updateDisplayOrder) allows an authenticated sitemap user to reorder arbitrary pages

Concrete CMS 9 before 9.5.3 authorized the dashboard sitemap reorder action Concrete\Controller\Backend\Dashboard\SitemapUpdate using only the global accesssitemap task permission and did not check per-page edit permission before updating each page's display order. As a result, an authenticated...

CVE-2026-18425 IDOR in Concrete CMS 9.0.0 through 9.5.2 dashboard sitemap reorder (SitemapUpdate::updateDisplayOrder) allows an authenticated sitemap user to reorder arbitrary pages

Concrete CMS 9 before 9.5.3 authorized the dashboard sitemap reorder action Concrete\Controller\Backend\Dashboard\SitemapUpdate using only the global accesssitemap task permission and did not check per-page edit permission before updating each page's display order. As a result, an authenticated...

EUVD-2026-79504

Concrete CMS 9 before 9.5.3 authorized the dashboard sitemap reorder action Concrete\Controller\Backend\Dashboard\SitemapUpdate using only the global accesssitemap task permission and did not check per-page edit permission before updating each page's display order. As a result, an authenticated...

CVE-2026-18425 IDOR in Concrete CMS 9.0.0 through 9.5.2 dashboard sitemap reorder (SitemapUpdate::updateDisplayOrder) allows an authenticated sitemap user to reorder arbitrary pages

Concrete CMS 9 before 9.5.3 authorized the dashboard sitemap reorder action Concrete\Controller\Backend\Dashboard\SitemapUpdate using only the global accesssitemap task permission and did not check per-page edit permission before updating each page's display order. As a result, an authenticated...

CVE-2026-18422 Concrete CMS below 9.5.3 Multilingual Page Assign Action Lacks Destination Authorization and CSRF Token Validation

Concrete CMS before 9.5.3 did not enforce a destination-side authorization check and did not validate a CSRF token in the multilingual page assignment backend action Backend\Page\Multilingual::assign. As a result, an authenticated user who held the Edit Page Multilingual Settings permission on a...

CVE-2026-18422

Concrete CMS before 9.5.3 is vulnerable in the multilingual page assignment backend action (Backend\Page\Multilingual::assign), where a destination-side authorization check and a CSRF token validation were both missing. An authenticated user holding only the Edit Page Multilingual Settings permis...

CVE-2026-18422 Concrete CMS below 9.5.3 Multilingual Page Assign Action Lacks Destination Authorization and CSRF Token Validation

Concrete CMS before 9.5.3 did not enforce a destination-side authorization check and did not validate a CSRF token in the multilingual page assignment backend action Backend\Page\Multilingual::assign. As a result, an authenticated user who held the Edit Page Multilingual Settings permission on a...

EUVD-2026-79235

Concrete CMS before 9.5.3 did not enforce a destination-side authorization check and did not validate a CSRF token in the multilingual page assignment backend action Backend\Page\Multilingual::assign. As a result, an authenticated user who held the Edit Page Multilingual Settings permission on a...

CVE-2026-18422 Concrete CMS below 9.5.3 Multilingual Page Assign Action Lacks Destination Authorization and CSRF Token Validation

Concrete CMS before 9.5.3 did not enforce a destination-side authorization check and did not validate a CSRF token in the multilingual page assignment backend action Backend\Page\Multilingual::assign. As a result, an authenticated user who held the Edit Page Multilingual Settings permission on a...

CVE-2026-81920

Concrete CMS below 9.5.3 was vulnerable to Cross-Site Request Forgery in the dashboard SEO Excluded Words page. The reset controller action cleared the administrator-configured reserved-word list concrete.seo.excludewords but did not validate the anti-CSRF token that the reset modal emitted, and ...

CVE-2026-81919

Concrete CMS below 9.5.3 did not validate an anti-CSRF token on the block-arrangement backend endpoint the arrange action of Concrete\Controller\Backend\Page\ArrangeBlocks. The action enforced page-edit authorization but performed no token check, and its route accepted any HTTP method, so an...

CVE-2026-81924

Concrete CMS before 9.5.3 is vulnerable to Cross-Site Request Forgery CSRF in the theme page-template activation feature. The Dashboard theme Inspect controller's activatefiles action created PageTemplate records from attacker-supplied pageTemplates values without validating an anti-CSRF token.A...

CVE-2026-78081

Joomla Extension - j2commerce.com - Missing CSRF protection on cart, checkout and myprofile controllers in J2Store 1.0.0-3.3.2, 4.0.0-4.0.22, 4.1.0-4.1.7 - A forged request riding a victim's active checkout session could silently overwrite the billing or shipping address before order confirmation...

CVE-2026-68532

Concrete CMS 9.0.0 to dashboard group type controller did not validate a CSRF token on its delete action, resulting in cross-site request forgery. A remote unauthenticated attacker could cause an authenticated user with group type management permission to delete a custom group type. The Concrete...