PatchTheCVECVE-2026-81897: In Concrete CMS below CMS 9.5.3, the save_control action in the Express entities forms dashboard controller di
CVE-2026-81897 is a medium-severity flaw (CVSS 5.4) affecting concrete cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 headline and body values to an existing Express form Text control. Those values were emitted without output encoding by the Express form Text element, so
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Last updated 2026-09-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-81897?
concrete cms: upgrade to 9.5.3. Exact commands for each OS are on this page.
Is CVE-2026-81897 being exploited?
CVE-2026-81897 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-81897 affect?
CVE-2026-81897 affects concrete cms. Severity is medium (CVSS 5.4). 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 atta
How urgent is CVE-2026-81897?
Priority 20/100. No elevated risk signals yet.
Related CVEs
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- CVE-2026-68526 MEDIUM 4.3 UPGRADE Concrete CMS before 9.5.3 did not validate an anti-CSRF token in the Calendar event duplicate dialog controlle
- CVE-2026-81912 MEDIUM 5.7 UPGRADE Concrete CMS before 9.5.3 is vulnerable to Cross-Site Request Forgery in the Move Multiple Groups feature
- CVE-2026-81913 MEDIUM 6.1 UPGRADE Concrete CMS versions 9.5.0 through 9.5.2 are vulnerable to Open Redirect via the rcURL parameter