CVE-2021-47939 Evolution CMS 3.1.6 Authenticated Remote Code Execution via Module Creation
Authenticated attackers with module creation permissions can execute arbitrary system commands by injecting PHP code into module parameters in Evolution CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47939?
CVE-2021-47939 is a high-severity code injection vulnerability in Evolution CMS, published on 10 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2021-47939?
How do I fix CVE-2021-47939?
No fix has been published for CVE-2021-47939 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-47939 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47939 exists.
Sources
Also known as GHSA-w3hh-x22g-mhjw.