Which versions of Audiobookshelf are affected by CVE-2025-46338?

Organizations using Audiobookshelf should be aware of notable risk from CVE-2025-46338, a cross-site scripting vulnerability rated CVSS 6.9.. A patch is available.

Is there a public PoC exploit available for CVE-2025-46338?

Yes, a public proof-of-concept exploit is available for CVE-2025-46338. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2025-46338?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Audiobookshelf CVE-2025-46338

Q: What is the CVSS score of CVE-2025-46338?

CVE-2025-46338 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.3%.

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-04-29 security-advisories@github.com

XSS Audiobookshelf

6.9

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.9 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

Patch released

Mar 28, 2026 - 18:39 nvd

Patch available

PoC Detected

May 09, 2025 - 19:37 vuln.today

Public exploit code

CVE Published

Apr 29, 2025 - 05:15 nvd

MEDIUM 6.9

DescriptionGitHub Advisory

Audiobookshelf is a self-hosted audiobook and podcast server. Prior to version 2.21.0, an improper input handling vulnerability in the /api/upload endpoint allows an attacker to perform a reflected cross-site scripting (XSS) attack by submitting malicious payloads in the libraryId field. The unsanitized input is reflected in the server’s error message, enabling arbitrary JavaScript execution in a victim's browser. This issue has been patched in version 2.21.0.

AnalysisAI

Audiobookshelf is a self-hosted audiobook and podcast server. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. Audiobookshelf is a self-hosted audiobook and podcast server. Prior to version 2.21.0, an improper input handling vulnerability in the /api/upload endpoint allows an attacker to perform a reflected cross-site scripting (XSS) attack by submitting malicious payloads in the libraryId field. The unsanitized input is reflected in the server’s error message, enabling arbitrary JavaScript execution in a victim's browser. This issue has been patched in version 2.21.0. Affected products include: Audiobookshelf. Version information: version 2.21.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.