CVE-2026-88997

JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key

Published Sep 23, 2026 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
The JSM Show Post Metadata WordPress plugin before 4.9.1 does not properly escape a post meta key before outputting it into an inline event-handler attribute in an admin-facing meta box, allowing users with contributor-level access and above to inject arbitrary JavaScript that executes in the session of a higher-privileged user who reviews the affected post.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wordpress-extensions
Wordpress-extensions jsm Show Post Metadata
Vendors & Products Wordpress-extensions
Wordpress-extensions jsm Show Post Metadata
Type Values Removed Values Added
Description The JSM Show Post Metadata WordPress plugin before 4.9.1 does not properly escape a post meta key before outputting it into an inline event-handler attribute in an admin-facing meta box, allowing users with contributor-level access and above to inject arbitrary JavaScript that executes in the session of a higher-privileged user who reviews the affected post.
Title JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Sep 23, 2026, 10:53 AM
Reserved
Sep 10, 2026, 4:07 PM
Status
Deferred
Published
Sep 23, 2026, 6:17 AM
Modified
Sep 23, 2026, 6:12 PM