CVE-2026-88997
JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key
MEDIUM 6.8EPSS 0.3%
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
- JSM Show Post Metadata
- CVSS v3.1 CNA
- 6.8 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H - EPSS
- 0.29% chance of exploitation in the next 30 days, 20th percentile
- Published
- 2026-09-23
Proof-of-concept exploits (2)
- https://wpscan.com/vulnerability/1699d3aa-29ca-4197-8e3b-0b03ecce751a/
- pervinzahidli/CVE-2026-889970★ · 2026-09-23