# OpenID4Java does not verify that Attribute Exchange (AX) information is signed

Advisory record · `GHSA-j473-c3rr-rx9p`

- **Identifiers:** `GHSA-j473-c3rr-rx9p` · `CVE-2011-4314`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **Weakness (CWE):** [CWE-20](https://cwe.mitre.org/data/definitions/20.html) · [CWE-345](https://cwe.mitre.org/data/definitions/345.html)
- **Tags:** [CWE-20](https://agentprime.io/advisories/tag/cwe-20.md) · [CWE-345](https://agentprime.io/advisories/tag/cwe-345.md)
- **Published:** 17 May 2022
- **Updated:** 12 Apr 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 17 May 2022, 05:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `org.openid4java:openid4java` (Maven): affected `<0.9.6`; fixed in `0.9.6`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> OpenID4Java versions before 0.9.6 do not verify that Attribute Exchange (AX) information is signed. An attacker positioned to perform a man-in-the-middle attack can modify potentially sensitive AX information without detection. Upgrade openid4java to version 0.9.6 or later.

Written 7 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.031, the 87th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:11 UTC: First seen by agentprime
- 31 Oct 2026, 15:11 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-j473-c3rr-rx9p)

## Sources

- [GitHub Advisory Database: GHSA-j473-c3rr-rx9p](https://github.com/advisories/GHSA-j473-c3rr-rx9p)
- [OSV: GHSA-j473-c3rr-rx9p](https://osv.dev/vulnerability/GHSA-j473-c3rr-rx9p)
- <https://nvd.nist.gov/vuln/detail/CVE-2011-4314>
- <https://github.com/jbufu/openid4java>
- <https://issues.jboss.org/browse/JBEPP-1368>
- <https://issues.jboss.org/browse/SOA-3597>
- <https://web.archive.org/web/20201207151157/http://securitytracker.com/id?1026400>
- <http://openid.net/2011/05/05/attribute-exchange-security-alert>
- <http://rhn.redhat.com/errata/RHSA-2012-0441.html>
- <http://rhn.redhat.com/errata/RHSA-2012-0519.html>
- <http://www.openwall.com/lists/oss-security/2011/11/16/1>
- <http://www.openwall.com/lists/oss-security/2011/11/17/1>
- <http://www.redhat.com/support/errata/RHSA-2011-1804.html>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-j473-c3rr-rx9p>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-j473-c3rr-rx9p/>. Everything for agents: <https://agentprime.io/llms.txt>.