CVE-2026-88997CWE-79cross-site-scripting

CVE-2026-88997

Medium · published September 23, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
20.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00293 · 20.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-23T10:17Z
References (1)
https://wpscan.com/vulnerability/1699d3aa-29ca-4197-8e3b-0b03ecce751a/ · [email protected]
EPSS history
Timeline
  • 24 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 23 SEP 06:00Z
    JSM Show Post Metadata < 4.9.1 - Contributor+ Stored XSS via Custom Field Meta Key
    cvelistv5