CVE-2026-42887

MediumCVSS 4.5/10Last modified Oct 26, 2026

Description

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to 2.33.0, a stored cross-site scripting (XSS) vulnerability exists in the Login Page due to improper sanitization of the authLoginCustomMessage field of the /api/auth-settings endpoint. An attacker with administrative privileges can inject arbitrary HTML/JavaScript that will be rendered on the login page for all users. This vulnerability is fixed in 2.33.0.

Metrics

CVSS 3.1 4.5/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
advplyr	audiobookshelf	< 2.33.0

References

Timeline

Published: May 11, 2026
Last modified: Oct 26, 2026
NVD status: Deferred

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