Mass entity deletion via unenforced CSRF check
Published Sep 11, 2026 · Updated Sep 11, 2026
CSRF in Concrete CMS 9.5.2 and earlier allows remote attackers to delete all entries for a selected Express entity. The Express Clear Entries controller logs a failed token check but continues processing POST /index.php/dashboard/system/express/entities/delete_entries when the token is missing or invalid. Exploitation requires an authenticated administrator to visit attacker-controlled content; the fixed Contact entity UUID removes the need for dashboard access.
Summary
What happened
CSRF in Concrete CMS 9.5.2 and earlier allows remote attackers to delete all entries for a selected Express entity. The Express Clear Entries controller logs a failed token check but continues processing POST /index.php/dashboard/system/express/entities/delete_entries when the token is missing or invalid. Exploitation requires an authenticated administrator to visit attacker-controlled content; the fixed Contact entity UUID removes the need for dashboard access.
The record
- CVE
- CVE-2026-81907
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- Concrete CMS
- Product
- Concrete CMS
- Classifications
- T1485
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.0.0 <=9.5.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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