CVE-2026-31271

9.8 criticalEPSS 0.6%

Critical (9.8). EPSS 0.6% chance of exploitation in the next 30 days.

megagao production_ssm v1.0 contains an authorization bypass vulnerability in the user addition functionality. The insert() method in UserController.java lacks authentication checks, allowing unauthenticated attackers to create super administrator accounts by directly accessing the /user/insert endpoint. This leads to complete system compromise.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 46% of CVEs (scores of 2026-10-31)
CWE: CWE-288
Published: 2026-04-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

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

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