CVE-2026-8426 Concrete CMS 9.5.0 and below is vulnerable to CSRF on prepare_remote_upgrade() leading to one-request RCE via package overwrite

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...

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-2026-8140 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 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...

EUVD-2026-31338

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-2026-8140 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-2026-8417

Concrete CMS 9.5.0 and earlier is vulnerable to CSRF in the do_update() handler for package upgrades. The endpoint /dashboard/extend/update/do_update/ is invoked via a state-changing GET request and only checks canInstallPackages() before calling upgradeCoreData() and upgrade() on the target pack...

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...

EUVD-2026-31334

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 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 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...

CVE-2026-8135 Concrete CMS 9.5.0 and below is vulnerable to RCE due to insecure deserialization occurring in the ExpressEntryList block controller.

Concrete CMS 9.5.0 and below is vulnerable to Remote Code Execution due to insecure deserialization occurring in the ExpressEntryList block controller. An rogue administrator with privileges to add blocks to an area can bypass the intended protection mechanism fromCIF === true, which normally...

CVE-2026-8135 Concrete CMS 9.5.0 and below is vulnerable to RCE due to insecure deserialization occurring in the ExpressEntryList block controller.

Concrete CMS 9.5.0 and below is vulnerable to Remote Code Execution due to insecure deserialization occurring in the ExpressEntryList block controller. An rogue administrator with privileges to add blocks to an area can bypass the intended protection mechanism fromCIF === true, which normally...

EUVD-2026-31336

Concrete CMS 9.5.0 and below is vulnerable to Remote Code Execution due to insecure deserialization occurring in the ExpressEntryList block controller. An rogue administrator with privileges to add blocks to an area can bypass the intended protection mechanism fromCIF === true, which normally...

CVE-2026-8135

Concrete CMS 9.5.0 and below is vulnerable to Remote Code Execution due to insecure deserialization occurring in the ExpressEntryList block controller. An rogue administrator with privileges to add blocks to an area can bypass the intended protection mechanism fromCIF === true, which normally...

CVE-2026-8135 Concrete CMS 9.5.0 and below is vulnerable to RCE due to insecure deserialization occurring in the ExpressEntryList block controller.

Concrete CMS 9.5.0 and below is vulnerable to Remote Code Execution due to insecure deserialization occurring in the ExpressEntryList block controller. An rogue administrator with privileges to add blocks to an area can bypass the intended protection mechanism fromCIF === true, which normally...

CVE-2026-8135

Concrete CMS 9.5.0 and below is vulnerable to Remote Code Execution via insecure deserialization in the ExpressEntryList block controller. A rogue admin with block-adding privileges can bypass protection by abusing REST API requests; json_decode() converts the string "true" to PHP Boolean true, a...