CVE-2021-47900 Gila CMS < 2.0.0 - Remote Code Execution
Unauthenticated attackers can execute arbitrary system commands via PHP code injection in the User-Agent header of Gila CMS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47900?
CVE-2021-47900 is a critical code injection vulnerability in Gila CMS, published on 27 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Gila CMS versions prior to 2.0.0 contain a remote code execution vulnerability that allows unauthenticated attackers to execute arbitrary system commands through manipulated HTTP headers. Attackers can inject PHP code in the User-Agent header with shell_exec() to run system commands by sending crafted requests to the admin endpoint.
Weakness: CWE-98
Which versions are affected by CVE-2021-47900?
How do I fix CVE-2021-47900?
No fix has been published for CVE-2021-47900 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-2021-47900 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47900 exists.
Sources
Also known as GHSA-xq2p-83g5-rqxp.