CVE-2026-42887: medium-severity vulnerability in advplyr audiobookshelf
Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
Published · Updated
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.5epss 0.4%
exploitation probability
0.4%top 73% of all CVEs
observed exploitation
nono source reports it
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:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Affected products
advplyr · audiobookshelfRelated CVEs — advplyr audiobookshelf
In the same product, most dangerous first.
CVE-2025-25205HIGHRemote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matchingEPSS 4.8%CVE-2026-71209HIGHaudiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path TraversalEPSS 1.9%CVE-2024-35236MEDIUMAudiobookshelf Cross-Site-Scripting vulnerability via crafted ebooksEPSS 0.8%CVE-2023-47624HIGHAudiobookshelf Arbitrary File Read VulnerabilityEPSS 0.8%CVE-2023-47619HIGHAudiobookshelf Server-Side Request Forgery and Arbitrary File Read VulnerabilityEPSS 0.6%CVE-2024-43797MEDIUMPath Traversal in audiobookshelfEPSS 0.5%