What’s Vulnerable › Vulnerabilities
CVE-2026-88997: JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key
- Severity: medium (CVSS 6.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-23 · updated 2026-09-23
- Weakness: CWE-79
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.
Affected products
- JSM Show Post Metadata: before 4.9.1 — fixed in 4.9.1
How to fix
Upgrade to a fixed version: JSM Show Post Metadata 4.9.1. Check the vendor advisory for mitigations.
References
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