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CVE-2025-25205

Audiobookshelf authentication bypass

8.2 HIGHPublic exploitEPSS 4.75%
  1. Published12 Feb 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityLow
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected products

Audiobookshelf≥ 2.17.0 < 2.19.1

Remediation

Fixed in
Audiobookshelf≥ 2.19.1

References

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Frequently asked

Is CVE-2025-25205 being actively exploited?

CVE-2025-25205 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 4.75%.

How severe is CVE-2025-25205?

CVE-2025-25205 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 4.75% probability of exploitation.

Which products are affected by CVE-2025-25205?

Affected products include Audiobookshelf.

How do I fix CVE-2025-25205?

Upgrade affected software to a fixed version, for example Audiobookshelf 2.19.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-25205 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.