Vulnerability DatabaseCVE-2026-42887
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CVE-2026-42887
Published:May 11, 2026
Updated:August 06, 2026
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.
Affected Packages
https://github.com/advplyr/audiobookshelf.git (GITHUB):
Affected version(s) >=v1.0.0 <v2.33.0
Fix Suggestion:
Update to version v2.33.0
Related Resources (3)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42887.json
https://nvd.nist.gov/vuln/detail/CVE-2026-42887
https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-cx29-ghq2-9cm4
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CVSS v4
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-79
EPSS
Base Score:
0.21