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CVE-2025-54414

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Date: July 25, 2025

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.

Severity Score

Severity Score

Weakness Type (CWE)

URL Redirection to Untrusted Site ('Open Redirect')

CWE-601

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

CWE-80

Top Fix

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Upgrade Version

Upgrade to version https://github.com/TecharoHQ/anubis.git - v1.21.3

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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