CVE-2026-88997
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.
- Published Sep 23, 2026
- CVSS 6.8 medium
- 0.3% chance of exploitation in the next 30 days (EPSS)
- A fix is available