CVE-2020-25557

HIGH

CMSuno 1.6.2 - Authenticated Remote Code Execution via Username Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-25557. PoCs published by Alexandre ZANNI.

AI-analyzed exploit summary This Ruby script exploits an authenticated remote code execution vulnerability in CMSUno 1.6.1 and 1.6.2 by injecting malicious payloads into the 'user' or 'lang' parameters. It handles authentication, anti-CSRF tokens, and command execution via system calls.

Description

In CMSuno 1.6.2, an attacker can inject malicious PHP code as a "username" while changing his/her username & password. After that, when attacker logs in to the application, attacker's code will be run. As a result of this vulnerability, authenticated user can run command on the server.

Exploits (1)

exploitdb WORKING POC
by Alexandre ZANNI · rubywebappsphp
https://www.exploit-db.com/exploits/49485

This Ruby script exploits an authenticated remote code execution vulnerability in CMSUno 1.6.1 and 1.6.2 by injecting malicious payloads into the 'user' or 'lang' parameters. It handles authentication, anti-CSRF tokens, and command execution via system calls.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: CMSUno 1.6.1, 1.6.2
Auth required
Prerequisites: Valid credentials for CMSUno · Access to the target's login page
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/161162/CMSUno-1.6.2-Remote-Code-Execution.html

Scores

CVSS v3 8.8
EPSS 0.0632
EPSS Percentile 91.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-94
Status published
Products (1)
cmsuno_project/cmsuno 1.6.2
Published Nov 13, 2020
Tracked Since Feb 18, 2026