CVE-2026-42887

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CVSS 3.1

4.5 medium

EPSS

<1%p11

Published

May 11, 2026 (May 11, 2026)

Modified

Jun 17, 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.

Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.2%)

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