Executive Summary

MRCMS 3.1.2 contains an access control vulnerability. The save() method in src/main/java/org/marker/mushroom/controller/UserController.java lacks proper authorization validation, enabling direct addition of super administrator accounts without authentication.

Why It Matters

CVE-2026-31272 is rated CRITICAL severity, requiring immediate attention from security teams.

CVSS Base Score: 9.8/10

EPSS (Exploit Prediction): 0.1% probability of exploitation in the next 30 days.

Affected Technologies

Vendors: mrcms

Products: mrcms

🛡️What Defenders Should Check

Check if you are affected — Review your asset inventory for products listed in CVE-2026-31272.

Apply available patches — Visit vendor advisories for the latest security updates.

Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

Use Vulnios to continuously monitor your exposure to CVE-2026-31272 and similar vulnerabilities.

References & Sources

https://github.com/clockw1se0v0/Vul/blob/main/MRCMS/Unauthorized.md

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Affected Products

mrcms

Sources

NVD / NIST

critical

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Critical Vulnerability: CVE-2026-31272 — mrcms — mrcms