CVE-2025-25205 Remote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matching
Attackers can bypass authentication via crafted URLs to access protected data or crash the Audiobookshelf server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-25205?
CVE-2025-25205 is a high-severity authentication bypass vulnerability in advplyr audiobookshelf, published on 12 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-25205?
It affects 1 product.
Products include Audiobookshelf Audiobookshelf.
How do I fix CVE-2025-25205?
No fix has been published for CVE-2025-25205 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-25205 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-25205 exists.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in advplyr audiobookshelf
- CVE-2025-57800 Audiobookshelf vulnerable to OIDC token exfiltration and account takeover
- CVE-2023-47619 Audiobookshelf Server-Side Request Forgery and Arbitrary File Read Vulnerability
- CVE-2023-47624 Audiobookshelf Arbitrary File Read Vulnerability
- CVE-2025-46338 Audiobookshelf Vulnerable to Cross-Site-Scripting Reflected via POST Request in /api/upload
- CVE-2024-43797 Path Traversal in audiobookshelf