Remote Code Execution Vulnerability in Evolution CMS by Evolution
CVE-2021-47939

8.7HIGH

Key Information:

Vendor

Evo

Status
Evolution Cms
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47939?

Evolution CMS version 3.1.6 has a security flaw that enables authenticated users with module creation permissions to inject malicious PHP code, leading to potential remote code execution. By crafting crafted POST requests to /manager/index.php with harmful code in the 'post' parameter, an attacker can create modules that allow the execution of arbitrary system commands. This vulnerability poses significant risks, particularly if exploited by attackers with user access, potentially compromising system integrity and confidential data.

Affected Version(s)

Evolution CMS 3.1.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47939 - Proof of Concept

References

https://www.exploit-db.com/exploits/50296
exploit
https://evo.im/
product
https://github.com/evolution-cms/evolution/releases
product

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Halit AKAYDIN (hLtAkydn)
.