CVE-2026-8435: 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 approveVersion. 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...

PT-2026-42563

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.1 Description Reflected Cross-Site Scripting XSS occurs in Legacy Pagination through HTML attribute injection. The ConcreteCoreLegacyPagination class constructs pagination links by raw-interpolating the $URL...

CVE-2026-8203: Improper Neutralization of Input During Web Page Generation

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...

PT-2026-42544

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-2026-8239: Missing Authorization

Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/getrating' endpoint confirms existence and returns rating score for any message by ID. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with...

CVE-2026-8337: Authorization Bypass Through User-Controlled Key

Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present on the site. An unauthenticated attacker can vote in the restricted survey by submitting the restricted optionID throu...

VulnCheck KEV: CVE-2026-26980

Ghost is a Node.js content management system. Versions 3.24.0 through 6.19.0 allow unauthenticated attackers to perform arbitrary reads from the database. This issue has been fixed in version 6.19.1...

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 missing identity verification mechanisms, which could allow unauthorized access to internal site structure data...

PT-2026-42683

Name of the Vulnerable Software and Affected Versions Umbraco CMS versions prior to 17.4.0 Description Authenticated users can inject HTML into an input field. This content is then rendered in the confirmation dialog without proper output encoding, leading to Cross-Site Scripting XSS or HTML...

CVE-2026-8409: Cross-Site Request Forgery (CSRF)

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/dialog/logs/delete. The 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...

PT-2026-42536

Name of the Vulnerable Software and Affected Versions Concrete CMS versions prior to 9.5.1 Description Remote Code Execution RCE is possible due to insecure deserialization in the ExpressEntryList block controller. An administrator with permissions to add blocks can bypass the fromCIF === true...

PT-2026-42580

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier Description The RSS Displayer block accepts a feed URL from page editors and fetches it server-side without proper validation. This lack of validation allows for redirect-to-internal bypasses, where an...

PT-2026-42547

Concrete CMS 9.5.0 and below contains a CSRF vulnerability in the install package method of concrete/controllers/single page/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...

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...

Concrete CMS Unauthenticated File Usage Disclosure

Concrete CMS formerly concrete5 9.x before 9.5.1 exposes the file usage dialog controller at /ccm/system/dialogs/file/usage/ without a view permission check CVE-2026-6826. An unauthenticated attacker can enumerate the numeric file ID space and, for every file registered in the file manager, learn...

PT-2026-42585

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...

CVE-2026-8413: Cross-Site Request Forgery (CSRF)

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery CSRF at concrete/controllers/dialog/page/bulk/design. 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 Yonata...

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, which stem from IDOR. These vulnerabilities may allow unauthorized parties to access confirmation messages and obtain ratings...

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...

PT-2026-42553

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier Description The submit password method in 'concrete/controllers/single page/download file.php' allows unauthorized file access because the process for downloading permission-restricted files bypasses the...