Vulnerability · Published Nov 13, 2025 · Assigned by GitHub_M

CVE-2025-64716Anubis vulnerable to possible XSS via redir parameter when using subrequest auth mode

Medium 5.1

In plain English

A medium-severity cross-site scripting in anubis from TecharoHQ. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.1Medium

Exploit odds (30 days)0.4%top 62.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Anubis is a Web AI Firewall Utility that challenges users' connections in order to protect upstream resources from scraper bots. Prior to version 1.23.0, when using subrequest authentication, Anubis did not perform validation of the redirect URL and redirects user to any URL scheme. While most modern browsers do not allow a redirect to `javascript:` URLs, it could still trigger dangerous behavior in some cases. Anybody with a subrequest authentication may be affected. Version 1.23.0 contains a fix for the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/TecharoHQ/anubis	1.23.0	GHSA-cf57-c578-7jvv
Go	github.com/TecharoHQ/anubis	1.23.0	GO-2025-4086

Affected products (as reported)

Vendor	Product	Versions
TecharoHQ	anubis	< 1.23.0

Weakness: CWE-79, CWE-601 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N

References

https://github.com/TecharoHQ/anubis/security/advisories/GHSA-cf57-c578-7jvv x_refsource_CONFIRM
https://github.com/TecharoHQ/anubis/commit/7ed1753fcced351c81961bf520a7bfb2caac6e88 x_refsource_MISC
https://pkg.go.dev/vuln/GO-2025-4086 x_refsource_MISC