CVE-2026-8433 Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescan()

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...

CVE-2026-8434

Concrete CMS 9.x prior to 9.5.0 is vulnerable to CSRF at the concrete/controllers/backend/file rescanMultiple() endpoint. Root cause: CSRF in the rescanMultiple() handler, reported with CVSS v4.0 vector AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N and a base score of 2.3 (LOW). Impact i...

CVE-2026-8435

Concrete CMS is affected: versions 9.0–9.4.x are vulnerable to Cross-Site Request Forgery in the approveVersion() endpoint located at concrete/controllers/backend/file. The issue is CSRF due to lack of proper request binding; exploitation would require user interaction. Remediation provided in so...

CVE-2026-7886

Concrete CMS versions 9.5.0 and below are vulnerable to an IDOR in AddMessage/UpdateMessage via the attachments[] parameter. The AddMessage and UpdateMessage controllers load files by ID with $em->find(File::class, $attachmentID) without per-file permission checks (canViewFile()), enabling a u...

CVE-2026-7882 Concrete CMS 9.5.0 and below is vulnerable to CSRF via the DeleteFile controller

Concrete CMS 9.5.0 and below is vulnerable to unauthorized file deletion due to an Inverted CSRF token check in the DeleteFile controller. The code throws an error when the token IS valid and proceeds with file deletion when the token is invalid or missing. This effectively disables CSRF protecti...

CVE-2026-8417

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

CVE-2026-7879 Concrete CMS 9.5.0 and below is vulnerable to File Download Authorization Bypass in submit_password()

In Concrete CMS 9.5.0 and below, the submitpassword method in concrete/controllers/singlepage/downloadfile.php allows unauthorized file access since downloading permission-restricted files bypasses the viewfile permission check. Files without passwords can be downloaded and any user who knows a...

CVE-2026-8238 Concrete CMS 9.5.0 and below is vulnerable to IDOR in '/ccm/frontend/conversations/message_page' allowing unauthenticated read of any conversation message

Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/messagepage' endpoint returns the full content of any conversation message. An unauthenticated attacker can enumerate all conversation messages, including messages from restricted pages, member-only areas, and th...

CVE-2026-8237

CVE-2026-8237 affects Concrete CMS 9.5.0 and earlier. The vulnerability is an IDOR in the /ccm/frontend/conversations/message_detail endpoint, which can expose full content of conversation messages, including those from restricted pages, member-only areas, and the moderation queue, as well as fil...

CVE-2026-8205

Concrete CMS

CVE-2026-8204 Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog

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-2026-8204 Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog

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-2026-8203

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...

CVE-2026-8421 Concrete CMS 9.5.0 and below is vulnerable to CSRF on install_package() with conditional token bypass leading to RCE

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...

CVE-2026-8426

Concrete CMS 9.5.0 and earlier fails to validate a CSRF token for requests to /dashboard/extend/update/prepare_remote_upgrade/. An attacker who controls the remote package returned for a known marketplace item ID can overwrite the package PHP on disk and trigger the upgrade() method in a single b...

PT-2026-42686

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...

PT-2026-42567

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.0.0 through 9.4.x Description Concrete CMS is subject to Cross Site Request Forgery CSRF, a flaw where an attacker tricks a victim into performing actions they did not intend to do. This issue occurs at the...

Concrete CMS 跨站请求伪造漏洞

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 concrete/controllers/backend/file function, which was vulnerable to cross-site request...

PT-2026-42540

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier Description An issue exists where a missing permission check in the usage controller allows unauthenticated visitors to disclose file usage information. By requesting the endpoint...

PT-2026-42565

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.5.0 and earlier Description An Insecure Direct Object Reference IDOR exists in the surveys feature. This occurs when a site is configured with both public and private surveys. An unauthenticated attacker can vote in a...