Auth bypass in Advplyr Audiobookshelf
CVE-2025-25205
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.048 (91.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.048 · newest: 0.048 · change: 0.000
Affected products
- Advplyr Audiobookshelf — versions >= 2.17.0, < 2.19.1
- Audiobookshelf
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/advplyr/audiobookshelf/security/advisories/GHSA-pg8v-5jcv-wrvw (Exploit, Vendor Advisory)
- github.com/advplyr/audiobookshelf/pull/3584 (Patch, Issue Tracking)
- github.com/advplyr/audiobookshelf/commit/bf8407274e3ee300af1927ee660d078a7a801e… (Patch)
- github.com/advplyr/audiobookshelf/commit/ec6537656925a43871b07cfee12c9f383844d2… (Patch)
- github.com/advplyr/audiobookshelf/blob/1a3d70d04100924d41391acb55bd8ddca486a4fa… (Product)
Frequently asked questions
- What is CVE-2025-25205?
- CVE-2025-25205 is a high-severity vulnerability in Advplyr Audiobookshelf, classified under CWE-202. CVSS score: 8.2/10. Published 2025-02-12.
- How severe is CVE-2025-25205?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2025-25205 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.