CVE-2026-42887

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.5
EPSS 0.0021
EPSS Percentile 10.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
advplyr/audiobookshelf < 2.33.0
Published May 11, 2026
Tracked Since May 12, 2026