GHSA-CF57-C578-7JVV

Vulnerability from github – Published: 2025-10-30 17:08 – Updated: 2025-11-15 03:11
VLAI?
Summary
Anubis vulnerable to possible XSS via redir parameter when using subrequest auth mode
Details

Summary

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.

GET https://example.com/.within.website/?redir=javascript:alert() responds with Location: javascript:alert().

Impact

Anybody with a subrequest authentication seems affected. Using javascript: URLs will probably be blocked by most modern browsers, but using custom protocols for third-party applications might still trigger dangerous operations.

Note

This was originally reported by @mbiesiad against Weblate.

Severity ?
0.0 (None)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
5.1 (Medium)
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
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/TecharoHQ/anubis"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.23.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-64716"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-30T17:08:12Z",
    "nvd_published_at": "2025-11-13T03:16:29Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nWhen 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.\n\n`GET https://example.com/.within.website/?redir=javascript:alert()` responds with `Location: javascript:alert()`.\n\n### Impact\n\nAnybody with a subrequest authentication seems affected. Using `javascript:` URLs will probably be blocked by most modern browsers, but using custom protocols for third-party applications might still trigger dangerous operations.\n\n### Note\n\nThis was originally reported by @mbiesiad against Weblate.",
  "id": "GHSA-cf57-c578-7jvv",
  "modified": "2025-11-15T03:11:17Z",
  "published": "2025-10-30T17:08:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/TecharoHQ/anubis/security/advisories/GHSA-cf57-c578-7jvv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64716"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TecharoHQ/anubis/commit/7ed1753fcced351c81961bf520a7bfb2caac6e88"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/TecharoHQ/anubis"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2025-4086"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Anubis vulnerable to possible XSS via redir parameter when using subrequest auth mode"
}


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