CVE-2026-42887— Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
Possible ATT&CK Techniques 1AI
T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| advplyr | audiobookshelf | < 2.33.0 | affected |
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I. Basic Information for CVE-2026-42887
Vulnerability Information
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Vulnerability Title
Audiobookshelf: Stored Cross-Site Scripting in Login Page Custom Message
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Audiobookshelf 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Audiobookshelf是Audiobookshelf开源的一个自托管的有声读物和播客服务器。 Audiobookshelf 2.33.0之前版本存在跨站脚本漏洞，该漏洞源于登录页面未正确清理authLoginCustomMessage字段，导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| advplyr | audiobookshelf | < 2.33.0 | - |
II. Public POCs for CVE-2026-42887
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · advplyr · 2026-05-11 · 6 CVEs total
| CVE-2026-42883 | 6.5 MEDIUM | Audiobookshelf: Cross-library file exfiltration via unscoped bulk download endpoint |
| CVE-2026-42886 | 4.9 MEDIUM | Audiobookshelf: Memory amplification DoS via oversized compressed details entry in backup |
| CVE-2026-42885 | 4.3 MEDIUM | Audiobookshelf: Path prefix bypass in filesystem existence check leaks out-of-scope file e |
| CVE-2026-42884 | 4.3 MEDIUM | Audiobookshelf: Collection endpoints bypass library access controls exposing restricted li |
| CVE-2026-42888 | Audiobookshelf: Path Traversal vulnerability in the audiobookshelf project |
IV. Related Vulnerabilities
Same product: audiobookshelf
- CVE-2026-42888
Audiobookshelf: Path Traversal vulnerability in the audioboo - CVE-2026-42886
Audiobookshelf: Memory amplification DoS via oversized compr - CVE-2026-42885
Audiobookshelf: Path prefix bypass in filesystem existence c - CVE-2026-42884
Audiobookshelf: Collection endpoints bypass library access c - CVE-2026-42883
Audiobookshelf: Cross-library file exfiltration via unscoped
Same vendor: advplyr
- CVE-2026-42888
Audiobookshelf: Path Traversal vulnerability in the audioboo - CVE-2026-42886
Audiobookshelf: Memory amplification DoS via oversized compr - CVE-2026-42885
Audiobookshelf: Path prefix bypass in filesystem existence c - CVE-2026-42884
Audiobookshelf: Collection endpoints bypass library access c - CVE-2026-42883
Audiobookshelf: Cross-library file exfiltration via unscoped
Same weakness: CWE-79
- CVE-2026-27964
FacturaScripts: Reflected Cross-Site Scripting (XSS) via Coo - CVE-2026-27737
BigBlueButton has Stored XSS in bbb-playback replay - CVE-2026-45231
DumbAssets 1.0.11 Stored Cross-Site Scripting via Asset Fiel - CVE-2026-45494
Microsoft Edge (Chromium-based) Spoofing Vulnerability - CVE-2026-7498
Stored XSS in Basamak Informatics' DernekWeb
V. Comments for CVE-2026-42887
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