CVE-2026-88997
Medium
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.
SeverityMedium
CVSS6.8
Exploit probability—
ProductJSM Show Post Metadata
PublishedSep 23, 2026
First seenSep 23, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- JSM Show Post Metadata4.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| JSM Show Post Metadata | v < 4.9.1 | 4.9.1 |
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