WordPress Plugin Vulnerabilities

JCH Optimize < 6.0.1 - Subscriber+ Stored XSS via getcacheinfo Task Override

Description

The plugin 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 plugin settings and store a script that executes in the browser of any visitor or administrator viewing the site.

Proof of Concept

Affects Plugins

Fixed in 6.0.1

References

Classification

Type
XSS
CWE
CVSS

Miscellaneous

Original Researcher
Artus KG
Submitter
Artus KG
Submitter twitter
Verified
Yes

Timeline

Publicly Published
2026-09-03 (about 2 days ago)
Added
2026-09-03 (about 1 day ago)
Last Updated
2026-09-04 (about 8 hours ago)

Other