CVE-2021-47903 LiteSpeed Web Server Enterprise 5.4.11 - Command Injection
Authenticated administrators can inject shell commands via the external app configuration interface, leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-47903?
CVE-2021-47903 is a high-severity command injection vulnerability in LiteSpeed Web Server Enterprise, published on 23 Jan 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
LiteSpeed Web Server Enterprise 5.4.11 contains an authenticated command injection vulnerability in the external app configuration interface. Authenticated administrators can inject shell commands through the 'Command' parameter in the server configuration, allowing remote code execution via path traversal and bash command injection.
Weakness: CWE-78
Which versions are affected by CVE-2021-47903?
How do I fix CVE-2021-47903?
No fix has been published for CVE-2021-47903 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-47903 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47903 exists.
Sources
Also known as GHSA-wc7g-3q2h-447c.