What is CVE-2026-27973?

CVE-2026-27973 is a medium-severity vulnerability in Advplyr Audiobookshelf, classified under Cross-site Scripting. CVSS score: 4.0/10. Published 2026-02-26.

How severe is CVE-2026-27973?

Medium severity. CVSS v3 base score is 4.0 out of 10.

XSS in Advplyr Audiobookshelf

CVE-2026-27973

Audiobookshelf is a self-hosted audiobook and podcast server. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 0.12.0-beta of the Audiobookshelf mobile application that allows arbitrary JavaScript execution thr…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Advplyr Audiobookshelf — versions < 2.12.0
Advplyr Audiobookshelf-app — versions < 0.12.0-beta

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-2433-p93m-xhhg (x_refsource_CONFIRM)
https://github.com/advplyr/audiobookshelf-app/commit/b2c2b625e3cf586562397f4c02e38059f2b8ef5c (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27973?: CVE-2026-27973 is a medium-severity vulnerability in Advplyr Audiobookshelf, classified under Cross-site Scripting. CVSS score: 4.0/10. Published 2026-02-26.
How severe is CVE-2026-27973?: Medium severity. CVSS v3 base score is 4.0 out of 10.