CVE-2026-84934CWE-79cross-site-scripting

CVE-2026-84934

High · published September 5, 2026

CVSS v3.1
8.0
EPSS
0%
Percentile
34.5
In the wild
Unconfirmed
What it is

The JCH Optimize WordPress plugin before 6.0.1 does not perform a capability check on one of its authenticated AJAX actions and lets the request choose which internal action runs, allowing any authenticated users such as Subscribers to import arbitrary JCH Optimize WordPress plugin before 6.0.1 settings and store a script that executes in the browser of any visitor or administrator viewing the site.

The record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00413 · 34.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-05T11:17Z
References (1)
https://wpscan.com/vulnerability/d808ad17-d20e-4ee5-94f3-935c10cde772/ · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 05 SEP 06:00Z
    JCH Optimize < 6.0.1 - Subscriber+ Stored XSS via getcacheinfo Task Override
    cvelistv5