CVE-2021-47939

HIGH

Evolution CMS 3.1.6 Authenticated Remote Code Execution via Module Creation

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47939. PoCs published by Halit AKAYDIN.

AI-analyzed exploit summary This exploit demonstrates an authenticated RCE vulnerability in Evolution CMS 3.1.6 by leveraging module creation functionality to execute arbitrary system commands. It authenticates as a privileged user, creates a malicious module, and executes commands via the 'post' parameter.

Description

Evolution CMS 3.1.6 contains a remote code execution vulnerability that allows authenticated users with module creation permissions to execute arbitrary system commands by injecting PHP code into module parameters. Attackers can send POST requests to /manager/index.php with malicious PHP code in the 'post' parameter to create modules that execute arbitrary commands when invoked.

Exploits (1)

exploitdb WORKING POC
by Halit AKAYDIN · pythonwebappsphp
https://www.exploit-db.com/exploits/50296

This exploit demonstrates an authenticated RCE vulnerability in Evolution CMS 3.1.6 by leveraging module creation functionality to execute arbitrary system commands. It authenticates as a privileged user, creates a malicious module, and executes commands via the 'post' parameter.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Evolution CMS 3.1.6
Auth required
Prerequisites: valid admin credentials · module creation permissions
devstral-2 · analyzed May 10, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit exploit
ExploitDB-50296
https://www.exploit-db.com/exploits/50296
Product product
Official Product Homepage
https://evo.im/
Product product
Product Reference
https://github.com/evolution-cms/evolution/releases
Third Party Advisory third-party-advisory
VulnCheck Advisory: Evolution CMS 3.1.6 Authenticated Remote Code Execution via Module Creation
https://www.vulncheck.com/advisories/evolution-cms-authenticated-remote-code-execution-via-module-creation

Scores

CVSS v3 8.8
EPSS 0.0064
EPSS Percentile 45.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-94
Status published
Products (1)
Evo/Evolution CMS 3.1.6
Published May 10, 2026
Tracked Since May 10, 2026