CVE-2026-27973Public exploitNetwork attack vector

Stored XSS via unsanitized search metadata

Published Feb 26, 2026 · Updated Feb 26, 2026

Stored XSS in advplyr Audiobookshelf Mobile App 0.11.0-beta and earlier allows remote authenticated users to execute JavaScript via metadata. ItemSearchCard.vue builds matchHtml from raw matchText and renders it through Vue v-html without escaping the surrounding library metadata. Exploitation requires library-modification privileges, an Audiobookshelf server 2.11.0 or earlier, and a victim who searches for matching text; the script can read session tokens or act through the victim's app context.

CVSS severity4.0
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in advplyr Audiobookshelf Mobile App 0.11.0-beta and earlier allows remote authenticated users to execute JavaScript via metadata. ItemSearchCard.vue builds matchHtml from raw matchText and renders it through Vue v-html without escaping the surrounding library metadata. Exploitation requires library-modification privileges, an Audiobookshelf server 2.11.0 or earlier, and a victim who searches for matching text; the script can read session tokens or act through the victim's app context.

The record

CVE
CVE-2026-27973
Published
Feb 26, 2026
Updated
Feb 26, 2026
Vendor
advplyr
Product
Audiobookshelf Mobile App
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.12.0-beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

advplyr · Audiobookshelf Mobile Appversion=< 0.12.0-beta
advplyr · Audiobookshelfversion=< 2.12.0

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
4.0GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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