Concrete does not validate a CSRF token before processing requests to `/dashboard/extend/update/do_update/<pkgHandle>`

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...

Concrete CMS does not validate a CSRF token before processing requests to `/dashboard/extend/update/prepare_remote_upgrade/<remoteMPID>`

Concrete CMS 9.5.0 and below does not validate a CSRF token before processing requests to /dashboard/extend/update/prepareremoteupgrade/. An attacker who controls the remote package returned for a known marketplace item ID can overwrite the package PHP on disk and force its upgrade method to...

Concrete CMS contains a CSRF vulnerability

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-2026-8433

Concrete CMS versions 9 before 9.5.0 are vulnerable to Cross Site Request Forgery (CSRF) in the rescan endpoint: concrete/controllers/backend/file rescan(). Root cause is CSRF in the rescan() function, enabling unauthorized state-changing requests from authenticated sessions. Affected software: C...

CVE-2026-8435 Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file approveVersion()

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...

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-2026-8426

Concrete CMS 9.5.0 and below does not validate a CSRF token before processing requests to /dashboard/extend/update/prepareremoteupgrade/. An attacker who controls the remote package returned for a known marketplace item ID can overwrite the package PHP on disk and force its upgrade method to...

CVE-2026-8140

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/singlepage/dashboard/extend/install.php checks only the canInstallPackages permission before fetching a remote marketplace...

CVE-2026-8421

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...

EUVD-2026-31339

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-2026-8428

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,...

CVE-2026-8428 CSRF token is not validated in the core CMS update controller for Concrete CMS 9.5.0 and below

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,...

CVE-2026-8428

Concrete CMS

EUVD-2026-31337

Concrete CMS 9.5.0 and below does not validate a CSRF token before processing requests to /dashboard/extend/update/prepareremoteupgrade/. An attacker who controls the remote package returned for a known marketplace item ID can overwrite the package PHP on disk and force its upgrade method to...

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...

CVE-2026-8140 Concrete CMS 9.5.0 and below is vulnerable to CSRF on download() in the package install controller

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/singlepage/dashboard/extend/install.php checks only the canInstallPackages permission before fetching a remote marketplace...

CVE-2026-8140 Concrete CMS 9.5.0 and below is vulnerable to CSRF on download() in the package install controller

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/singlepage/dashboard/extend/install.php checks only the canInstallPackages permission before fetching a remote marketplace...

CVE-2026-8140

CVE-2026-8140 affects Concrete CMS 9.5.0 and below. The issue is a CSRF vulnerability in the download() function of concrete/controllers/single_page/dashboard/extend/install.php, which does not validate a CSRF token before processing requests to /dashboard/extend/install/download/. The function o...

CVE-2026-8417 Concrete CMS 9.5.0 and below is vulnerable to CSRF in do_update() in the package update controller

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-2026-8417

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...