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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | JSM Show Post Metadata | < 4.9.1 | 4.9.1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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pervinzahidli/CVE-2026-88997 ★ 0 · Sep 21, 2026
JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://wpscan.com/vulnerability/1699d3aa-29ca-4197-8e3b-0b03ecce751a/ exploit vdb-entry technical-description