# CVE-2025-25205

## Summary

- **CVE ID:** CVE-2025-25205
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)
- **CWE:** CWE-202, CWE-287, CWE-400
- **Published:** Feb 12, 2025
- **Last Modified:** Mar 12, 2026

## Description

Audiobookshelf is a self-hosted audiobook and podcast server. Starting in version 2.17.0 and prior to version 2.19.1, a flaw in the authentication bypass logic allows unauthenticated requests to match certain unanchored regex patterns in the URL. Attackers can craft URLs containing substrings like "/api/items/1/cover" in a query parameter (?r=/api/items/1/cover) to partially bypass authentication or trigger server crashes under certain routes. This could lead to information disclosure of otherwise protected data and, in some cases, a complete denial of service (server crash) if downstream code expects an authenticated user object. Version 2.19.1 contains a patch for the issue.

## Affected Products

- advplyr — audiobookshelf (>= 2.17.0, < 2.19.1)

## References

- [CNA](https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw)
- [CNA](https://github.com/advplyr/audiobookshelf/pull/3584)
- [CNA](https://github.com/advplyr/audiobookshelf/commit/bf8407274e3ee300af1927ee660d078a7a801e1c)
- [CNA](https://github.com/advplyr/audiobookshelf/commit/ec6537656925a43871b07cfee12c9f383844d224)
- [CNA](https://github.com/advplyr/audiobookshelf/blob/1a3d70d04100924d41391acb55bd8ddca486a4fa/server/Auth.js#L17-L41)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 4.75%
- **EPSS Percentile:** 91.3

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._