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OpenAdvisories
Medium · 4.5 CVE-2026-42887 EUVD-2026-29210

Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message

Published May 11, 2026 · Updated May 12, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
advplyr audiobookshelf < 2.33.0 —

References