CVE-2026-7887: Improper Validation of Specified Type of Input

For Concrete CMS 9.5.0 and below, OAuth 2.0 Authorization-Code Handler Bypasses Account Status. A user with uIsActive=0 suspended, banned, terminated employee can still authenticate via OAuth and receive valid API tokens. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score o...

Concrete CMS code vulnerabilities

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier have code vulnerabilities. These vulnerabilities stem from the RSS Displayer block accepting arbitrary feed URLs without validation, which may lead to redirection to...

PT-2026-42561

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.1 Description An Insecure Direct Object Reference IDOR exists where the '/ccm/frontend/conversations/get rating' endpoint confirms the existence of and returns the rating score for any message by ID. IDOR is ...

CVE-2026-8428: Cross-Site Request Forgery (CSRF)

Concrete CMS 9.5.0 and below emits a CSRF token in the localavailableupdate.php view $token-output'doupdate' but the corresponding doupdate method in concrete/controllers/singlepage/dashboard/system/update/update.php never calls $this-token-validate'doupdate'. The form is rendered as a POST form,...

PT-2026-42541

Concrete CMS 9.5.0 and below does not validate a CSRF token before processing requests to /dashboard/extend/install/download/. The download method in concrete/controllers/single page/dashboard/extend/install.php checks only the canInstallPackages permission before fetching a remote marketplace...

PT-2026-42574

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.0.0 through 9.4.x Description Cross Site Request Forgery CSRF occurs at the 'concrete/controllers/backend/file' endpoint within the star function. CSRF is a flaw that allows an attacker to induce a user to perform actio...

PT-2026-42576

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.0 through 9.4.x Description Cross Site Request Forgery CSRF occurs at the 'concrete/controllers/backend/file' endpoint within the rescanMultiple function. CSRF is a type of attack that tricks a victim into submitting a...

CVE-2026-8433: 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 rescan. 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...

Concrete CMS Cross-Site Request Forgery Vulnerability

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS prior to 9.5.0 had a cross-site request forgeing vulnerability. This vulnerability stemmed from the concrete/controllers/backend/file rescan function, which was vulnerable to cross-site...

PT-2026-42575

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.0.0 through 9.4.x Description Cross Site Request Forgery CSRF occurs at the 'concrete/controllers/backend/file' endpoint within the rescan function. CSRF is a type of attack that tricks a victim into submitting a...

Concrete CMS Cross-Site Request Forgery Vulnerability

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions prior to Concrete CMS 9.5.0 had a cross-site request forgeing vulnerability. This vulnerability stemmed from the function concrete/controllers/backend/file approveVersion, which was vulnerable to cross-si...

Concrete CMS security vulnerabilities

Concrete CMS is an open-source content management system designed for teams. Concrete CMS versions 9.5.0 and earlier have security vulnerabilities. These vulnerabilities stem from a lack of authorization in the bulkuserassignment.php file, which may lead to permissions being granted to...

CVE-2026-8350: Incorrect Authorization

Concrete CMS 9.5.0 and below is vulnerable to missing authorization in the bulkuserassignment.php which can lead to privilege escalation to Administrative Group. Any authenticated user with access to the bulk user assignment dashboard page can add any user email to any group and can remove...

Concrete CMS Cross-Site Request Forgery Vulnerability

Concrete CMS is an open-source content management system designed for teams. Versions of Concrete CMS prior to 9.5.0 had a cross-site request forgeing vulnerability. This vulnerability stems from the function concrete/controllers/backend/file addFavoriteFolder$id, which is vulnerable to cross-sit...

PT-2026-42537

Concrete CMS 9.5.0 and below does not validate a CSRF token before processing requests to /dashboard/extend/update/do update/. The do update method in concrete/controllers/single page/dashboard/extend/update.php checks only canInstallPackages before executing upgradeCoreData and upgrade on the...

PT-2026-42554

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier Description An Insecure Direct Object Reference IDOR, which occurs when an application provides direct access to objects based on user-supplied input, exists in the Express Entry Detail block. By...

CVE-2026-8421: Cross-Site Request Forgery (CSRF)

Concrete CMS 9.5.0 and below contains a CSRF vulnerability in the installpackage method of concrete/controllers/singlepage/dashboard/extend/install.php. An attacker who can cause an authenticated administrator to visit a crafted page, and who has placed or caused a package to be present under...

PT-2026-42705

🟠 Umbraco CMS, Open Redirect in Surface Controllers, CVE-2025-47874 Medium https://t.co/PmivsVMa8k...

CVE-2026-8204: Authorization Bypass Through User-Controlled Key

Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a...

CVE-2026-8139: Improper Neutralization of Input During Web Page Generation

Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via external-link page cvName because updateCollectionAliasExternal bypasses being sanitized. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.0 with...