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TI-2025-18874 Aliases CVE-2025-25205

Remote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matching

Priority HIGH 75CWE-202Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Denial of service
Confidentiality · integrity · availability
Low · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287 and CWE-400.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.04753 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed audiobookshelf (advplyr): 2.19.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
advplyraudiobookshelf2.17.0 to before 2.19.12.19.1Patch availableCNA
  • audiobookshelf Vendoradvplyr Affected 2.17.0 to before 2.19.1 Fixed in 2.19.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:audiobookshelf:audiobookshelf:*:*:*:*:*:*:*:*2.17.0 to before 2.19.1Vulnerableadvplyr
  • cpe:2.3:a:audiobookshelf:audiobookshelf:*:*:*:*:*:*:*:* Versions 2.17.0 to before 2.19.1 Vulnerable ·advplyr

Remediation

  • Fix · CNA audiobookshelf (advplyr) Fixed in 2.19.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-25205

References

Exploit 1

Patch 3

Other 1

  • TI-2025-35683 Audiobookshelf vulnerable to OIDC token exfiltration and account takeover CVSS 3.1HIGH 8.8
  • TI-2025-29079 Audiobookshelf Vulnerable to Cross-Site-Scripting Reflected via POST Request in /api/upload CVSS 4.0MEDIUM 6.9
  • TI-2023-25761 Audiobookshelf Server-Side Request Forgery and Arbitrary File Read Vulnerability CVSS 3.1HIGH 8.1
  • TI-2024-29391 Path Traversal in audiobookshelf CVSS 3.1MEDIUM 6.3
  • TI-2026-22306 Audiobookshelf has Stored XSS in Tooltip.vue via Audiobook Metadata CVSS 3.1MEDIUM 4.8
  • TI-2024-23305 Audiobookshelf Cross-Site-Scripting vulnerability via crafted ebooks CVSS 3.1MEDIUM 4.8
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences