CVE-2026-42887

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

Published May 11, 2026 CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Advplyr
Advplyr audiobookshelf
Vendors & Products Advplyr
Advplyr audiobookshelf
Type Values Removed Values Added
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.
Title Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 12, 2026, 1:29 PM
Reserved
Apr 30, 2026, 6:49 PM
Status
Deferred
Published
May 11, 2026, 8:25 PM
Modified
Oct 26, 2026, 6:10 PM