CVE-2026-18116

Concrete CMS versions 8.3.0 through 9.5.2 are affected by a Stored XSS in calendar event names. Event names were stored without sanitization and rendered without HTML escaping in the workflow approval/deletion notifications within the dashboard "Waiting For Me" block. A registered user with permi...

CVE-2026-18116 Concrete CMS 8.3.0 to 9.5.2 is vulnerable to Stored XSS in Calendar Event Name via Workflow Approval Notifications

Concrete CMS 8.3.0 to 9.5.2 stored calendar event names without sanitization and rendered them without HTML escaping in the workflow approval and deletion notifications shown in the dashboard "Waiting For Me" block. A registered user permitted to add events to a calendar governed by an approval...

CVE-2026-18117 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Stored XSS in Custom Page Alias Name

Concrete CMS 9.0.0 through 9.5.3 is vulnerable to stored XSS via the custom page alias name customAliasName because the Edit Alias dialog applied only trim to the submitted value and performed no input neutralization. An authenticated user holding canWrite editor permission on a page could store ...

CVE-2026-18117 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Stored XSS in Custom Page Alias Name

Concrete CMS 9.0.0 through 9.5.3 is vulnerable to stored XSS via the custom page alias name customAliasName because the Edit Alias dialog applied only trim to the submitted value and performed no input neutralization. An authenticated user holding canWrite editor permission on a page could store ...

CVE-2026-18117 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to Stored XSS in Custom Page Alias Name

Concrete CMS 9.0.0 through 9.5.3 is vulnerable to stored XSS via the custom page alias name customAliasName because the Edit Alias dialog applied only trim to the submitted value and performed no input neutralization. An authenticated user holding canWrite editor permission on a page could store ...

CVE-2026-18117

Concrete CMS 9.0.0 through 9.5.3 contains a stored XSS vulnerability in the custom page alias name (customAliasName) field. The root cause is that the Edit Alias dialog applied only trim() to the submitted value without performing input neutralization. An authenticated user with canWrite (editor)...

CVE-2026-81901

In Concrete CMS 9.2.0 through 9.5.2, the REST API page update endpoint PUT /ccm/api/1.0/pages/cID did not enforce page-property, page-template, or page-type authorization. A user granted only content-editing rights on a page could therefore alter its properties, template, and type through the API...

CVE-2026-81903

Concrete CMS versions 9.0.0 to 9.5.2 stored the Page Container icon value submitted through the dashboard without validating it against the set of known container icons. The unvalidated value was later concatenated into the src attribute of an img tag by a helper that did not encode attribute...

CVE-2026-81902

Concrete CMS 9 through 9.5.2 did not validate a CSRF token in the orphaned block removal panel action removeOrphanedBlocks. A remote attacker could craft a request that, when loaded by an authenticated user holding edit permission on the target page, deleted every block on that page's current...

CVE-2026-81901 Concrete CMS 9.2.0 to 9.5.2 is vulnerable to stored XSS due to missing authorization in the `PUT /pages/{cID}` endpoint

In Concrete CMS 9.2.0 through 9.5.2, the REST API page update endpoint PUT /ccm/api/1.0/pages/cID did not enforce page-property, page-template, or page-type authorization. A user granted only content-editing rights on a page could therefore alter its properties, template, and type through the API...

CVE-2026-81901 Concrete CMS 9.2.0 to 9.5.2 is vulnerable to stored XSS due to missing authorization in the `PUT /pages/{cID}` endpoint

In Concrete CMS 9.2.0 through 9.5.2, the REST API page update endpoint PUT /ccm/api/1.0/pages/cID did not enforce page-property, page-template, or page-type authorization. A user granted only content-editing rights on a page could therefore alter its properties, template, and type through the API...

EUVD-2026-78089

In Concrete CMS 9.2.0 through 9.5.2, the REST API page update endpoint PUT /ccm/api/1.0/pages/cID did not enforce page-property, page-template, or page-type authorization. A user granted only content-editing rights on a page could therefore alter its properties, template, and type through the API...

CVE-2026-81901

Concrete CMS versions 9.2.0 through 9.5.2 are affected by a stored cross-site scripting (XSS) vulnerability in the REST API page update endpoint (PUT /ccm/api/1.0/pages/{cID} ). The endpoint did not enforce page-property, page-template, or page-type authorization, allowing a user with only conten...

CVE-2026-81901 Concrete CMS 9.2.0 to 9.5.2 is vulnerable to stored XSS due to missing authorization in the `PUT /pages/{cID}` endpoint

In Concrete CMS 9.2.0 through 9.5.2, the REST API page update endpoint PUT /ccm/api/1.0/pages/cID did not enforce page-property, page-template, or page-type authorization. A user granted only content-editing rights on a page could therefore alter its properties, template, and type through the API...

CVE-2026-81902 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to CSRF on Orphan Block Cleanup

Concrete CMS 9 through 9.5.2 did not validate a CSRF token in the orphaned block removal panel action removeOrphanedBlocks. A remote attacker could craft a request that, when loaded by an authenticated user holding edit permission on the target page, deleted every block on that page's current...

CVE-2026-81902 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to CSRF on Orphan Block Cleanup

Concrete CMS 9 through 9.5.2 did not validate a CSRF token in the orphaned block removal panel action removeOrphanedBlocks. A remote attacker could craft a request that, when loaded by an authenticated user holding edit permission on the target page, deleted every block on that page's current...

EUVD-2026-78088

Concrete CMS 9 through 9.5.2 did not validate a CSRF token in the orphaned block removal panel action removeOrphanedBlocks. A remote attacker could craft a request that, when loaded by an authenticated user holding edit permission on the target page, deleted every block on that page's current...

CVE-2026-81902

Concrete CMS versions 9.0.0 through 9.5.2 contain a CSRF vulnerability in the orphaned block removal panel action (removeOrphanedBlocks) due to a missing CSRF token validation. A remote attacker can craft a request that, when loaded by an authenticated user with edit permission on the target page...

CVE-2026-81902 Concrete CMS 9.0.0 to 9.5.2 is vulnerable to CSRF on Orphan Block Cleanup

Concrete CMS 9 through 9.5.2 did not validate a CSRF token in the orphaned block removal panel action removeOrphanedBlocks. A remote attacker could craft a request that, when loaded by an authenticated user holding edit permission on the target page, deleted every block on that page's current...

CVE-2026-18119

Concrete CMS below 9.5.3 did not sanitize custom style values in the Block Design dialog before writing them into page CSS via a DOM sink, permitting stored cross-site scripting. An editor-level user could execute script in an administrator's session and escalate privileges. The Concrete CMS...