Home→Vulnerabilities→CVE-2026-7882
Disclosed

CVE-2026-7882

Concrete CMS 9.5.0 and below is vulnerable to unauthorized file deletion due to an Inverted CSRF token check in the DeleteFile controller. The code throws an error when the token IS valid and proceeds with file deletion when the token is invalid or missing. This effectively disables CSRF protection for the file deletion endpoint, allowing cross-site request forgery attacks against users who have permission to edit conversation messages. The Concrete CMS security team gave this vulnerability a

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Exploitation Probability (EPSS)

Low Priority
0.03%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

1 events
May 21, 2026
Vulnerability Disclosed
Published to component-level vulnerability database.

Threat Actor Attribution

PREMIUM INTEL
Associated Groups:Lazarus Group, APT28
Ransomware Campaigns:LockBit 3.0, BlackCat
IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

References

https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notesConcretecms

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Check your domain or package.json for CVE-2026-7882 exposure.

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Vulnerability Details

CVSS Base Score
N/A/ 10
Published Date
May 21, 2026
Last Modified
May 21, 2026
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