CVE-2026-18426

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

CVE-2026-18426 Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

CVE-2026-18426

Concrete CMS versions 9.0.0 through 9.5.2 are affected by a missing authorization flaw in the Express Form block . Control-management actions (add, modify, delete) relied solely on CSRF token validation, but the token is bound only to the user and action—not to a specific block, page, or form. Th...

CVE-2026-18426 Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

EUVD-2026-79942

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

CVE-2026-18426 Concrete CMS 9.0.0 to 9.5.2 Express Form block missing authorization allows an authenticated editor to modify Express Forms they cannot edit

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

CVE-2026-81897 Concrete CMS below version 9.5.3 is vulnerable to Stored XSS via Express form Text control save_control

In Concrete CMS below CMS 9.5.3, the savecontrol action in the Express entities forms dashboard controller did not validate the anti-CSRF token. By causing an authenticated administrator to submit a forged cross-site request, a remote attacker without credentials could write attacker-controlled...

CVE-2026-81897 Concrete CMS below version 9.5.3 is vulnerable to Stored XSS via Express form Text control save_control

In Concrete CMS below CMS 9.5.3, the savecontrol action in the Express entities forms dashboard controller did not validate the anti-CSRF token. By causing an authenticated administrator to submit a forged cross-site request, a remote attacker without credentials could write attacker-controlled...

CVE-2026-68534: Improper Neutralization of Input During Web Page Generation

Concrete CMS before 9.5.3 rendered Express entry labels as raw HTML when displaying associated entries, resulting in stored cross-site scripting. An unauthenticated attacker could submit a payload through a public Express Form; it then executed in an administrator's dashboard session when the...

PT-2026-92131

In Concrete CMS below CMS 9.5.3, the save control action in the Express entities forms dashboard controller did not validate the anti-CSRF token. By causing an authenticated administrator to submit a forged cross-site request, a remote attacker without credentials could write attacker-controlled...

CVE-2026-18426: Missing Authorization

Concrete CMS 9.0.0 through 9.5.2 did not enforce a block-level edit-permission check on the Express Form block's control-management actions, which relied solely on CSRF token validation. Because the token is bound to the user and action rather than to a specific block, page, or form, an...

PT-2026-93112

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.0.0 through 9.5.2 Description An issue exists where block-level edit-permission checks are not enforced on the Express Form block's control-management actions. The system relies exclusively on CSRF Cross-Site Request...

GHSA-CHFM-CM6H-Q5X7 Concrete CMS is subject to Insecure Direct Object Reference (IDOR) in the Express Entry Detail block

Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference IDOR in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team thanks Tristan Madani for reporting this issue...

CVE-2026-7881

Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference IDOR in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3...

CVE-2026-7881 Concrete CMS 9.5.0 and below is vulnerable to IDOR in the Express Entry Detail block

Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference IDOR in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3...

CVE-2026-7881 Concrete CMS 9.5.0 and below is vulnerable to IDOR in the Express Entry Detail block

Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference IDOR in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3...

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...

Concrete CMS 安全漏洞

Concrete CMS is an open-source content management system developed by Concrete CMS. Versions of Concrete CMS 9.5.0 and earlier have security vulnerabilities. These vulnerabilities stem from insecure direct object references in the Express Entry Detail block, which may allow unauthorized access to...

Concrete CMS: XSS in select attribute options

To reproduce 1. Create a new select attribute. 2. Add a select attribute option with value alert'XSS' and hit Save. 3. Edit the newly created attribute again and see XSS dialog. The vulnerability lays in the typeform.php file, see...