CVE-2026-42887CWE-79

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

Medium · published May 11, 2026

CVSS v3.1
4.5
EPSS
0%
Percentile
28.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00358 · 28.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-11T19:55Z
EPSS history
Timeline
  • 11 MAY 19:55Z
    Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
    cvelistv5