CVE-2026-42887

MEDIUM EPSS 10.9%

Published May 11, 20261mo ago · Modified Jun 17, 20262w ago

4.5 CVSS 3.1

Medium

Published May 11, 2026 1mo ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

4.5

Exploitability

0.9

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required High

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity None

Availability None

Threat Intelligence

EPSS Exploit Probability

10.9% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 1

github.com https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.