Unauthorized allowlist changes via post-save token validation
Published Mar 4, 2026 · Updated Mar 4, 2026
CSRF in Concrete CMS before 9.4.8 allows remote attackers to alter the Anti-Spam Allowlist Group through a victim administrator's browser. The update_library controller saves the attacker-supplied group_id as concrete.spam.allowlist_group before validating the update_library token. Exploitation requires an authenticated administrator's browser to submit the crafted request, and the demonstrated consequence is an unauthorized allowlist-group configuration change.
Summary
What happened
CSRF in Concrete CMS before 9.4.8 allows remote attackers to alter the Anti-Spam Allowlist Group through a victim administrator's browser. The update_library controller saves the attacker-supplied group_id as concrete.spam.allowlist_group before validating the update_library token. Exploitation requires an authenticated administrator's browser to submit the crafted request, and the demonstrated consequence is an unauthorized allowlist-group configuration change.
The record
- CVE
- CVE-2026-2994
- Published
- Mar 4, 2026
- Updated
- Mar 4, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-352
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 4, 2026CVE publishedPublication date reported by the CVE source.
- Mar 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo