CVE-2025-46338: audiobookshelf XSS — Exploit & Fix

Description

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.

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CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
audiobookshelf	audiobookshelf	< 2.21.0

References

Advisories & Patches

https://github.com/advplyr/audiobookshelf/commit/35870a01583b2947030f4e3d4ac769c3ff298386 https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-47g3-c5hx-2q3w

Exploits

https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-47g3-c5hx-2q3w

Frequently Asked Questions

What is CVE-2025-46338? +

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. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2025-46338? +

CVE-2025-46338 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-46338? +

CVE-2025-46338 affects products from audiobookshelf, specifically: audiobookshelf. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-46338? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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