CVE-2026-88997JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key
Updated under an hour ago ()
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It affects Unknown JSM Show Post Metadata. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.8 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- WPScan
- NVD analysis
- Deferred
- Record last updated
- Sep 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Unknown JSM Show Post Metadata unknown:jsm_show_post_metadata (from the name) | before 4.9.1 | CNA record |
References
- https://wpscan.com/vulnerability/1699d3aa-29ca-4197-8e3b-0b03ecce751a/exploit, vdb-entry, technical-description
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.