CVE-2026-31272

CRITICAL

MRCMS 3.1.2 - Unauthenticated Privilege Escalation via UserController save() Method

Title source: llm

Description

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.

References (1)

Core 1

Core References

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

View Writeup ZIP pw:eip

Scores

CVSS v3 9.8

EPSS 0.0058

EPSS Percentile 42.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-284

Status published

Products (1)

mrcms/mrcms 3.1.2

Published Apr 07, 2026

Tracked Since Apr 07, 2026