PT-2026-39752 · Unknown · Audiobookshelf

Vito0912 · CVE-2026-42887 · Published 2026-05-11 · Updated 2026-05-11

Positive Technologies (AI Summary)

CVSS v3.1

4.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Audiobookshelf versions prior to 2.33.0

Description A stored cross-site scripting (XSS) issue exists in the Login Page. This occurs because the /api/auth-settings endpoint does not properly sanitize the authLoginCustomMessage field. An attacker with administrative privileges can inject arbitrary HTML or JavaScript, which is then rendered on the login page for all users.

Recommendations Update to version 2.33.0.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-42887

GHSA-CX29-GHQ2-9CM4

Affected Products

Audiobookshelf

References · 4

• 🔥 https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4 · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42887.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-42887 · Security Note
• https://osv.dev/vulnerability/CVE-2026-42887 · Vendor Advisory