Security readout for executives and security teams
Plain-English summary
CVE-2026-27973 is a stored cross-site scripting issue in Audiobookshelf’s mobile app search results. A user who can modify library metadata could plant malicious content that runs when another user views affected search results. Business impact is mainly account/session compromise or data exposure for Audiobookshelf users, not full server takeover based on current sources.
Executive priority
Treat as a moderate-priority update. It is not known to be exploited and requires privileged metadata access plus user interaction, but shared-library environments should patch promptly to reduce account and data exposure risk.
Technical view
The issue is CWE-79 stored XSS in ItemSearchCard.vue, triggered through malicious audiobook metadata in mobile app search results. Affected versions are audiobookshelf-app before 0.12.0-beta and Audiobookshelf before 2.12.0. CVSS 3.1 is 4.0: network reachable, high attack complexity, high privileges required, user interaction required, changed scope, low confidentiality and integrity impact.
Likely exposure
Exposure is limited to organizations or individuals running Audiobookshelf with vulnerable mobile app/server versions and allowing users to modify library metadata. Risk rises where multiple users share libraries or metadata editing is delegated to semi-trusted users.
Exploitation context
No active exploitation is reported in the provided sources, and the CVE is not marked as KEV. Exploitation requires an attacker with library modification privileges and a victim opening affected search results in the mobile app WebView/browser context.
Researcher notes
Evidence points to stored XSS in mobile search rendering of audiobook metadata, fixed by an audiobookshelf-app commit. Sources do not provide evidence of public exploitation. Avoid assuming broader server-side compromise; assess trust boundaries around metadata editing and mobile WebView/session handling.
Mitigation direction
- Upgrade audiobookshelf-app to 0.12.0-beta or later.
- Upgrade Audiobookshelf to 2.12.0 or later, per the advisory mapping.
- Review vendor advisory and commit for deployment-specific guidance.
- Limit library metadata modification rights to trusted users until upgraded.
Validation and detection
- Inventory Audiobookshelf server and mobile app versions.
- Confirm mobile clients are at least 0.12.0-beta.
- Confirm server deployment is at least 2.12.0.
- Review library editors and remove unnecessary metadata modification privileges.
- Check vendor advisory for any updated fixed versions or caveats.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-27973 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4MediumVector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/advplyr/audiobookshelf/security/advisories/GHSA-2433-p93m-xhhgCVE reference · x_refsource_CONFIRM
- https://github.com/advplyr/audiobookshelf-app/commit/b2c2b625e3cf586562397f4c02e38059f2b8ef5cCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.