WordPress Plugin Vulnerabilities
Cookie Notice & Compliance for GDPR / CCPA < 2.1.2 - Admin+ Stored Cross-Site Scripting
Description
The plugin does not escape the value of its Button Text setting when outputting it in an attribute in the frontend, allowing high privilege users such as admin to perform Cross-Site Scripting even when the unfiltered_html capability is disallowed.
Proof of Concept
Put the following payload in the Button text setting of the plugin (in the Notice Setting section) " style=animation-name:twentytwentyone-close-button-transition onanimationend=alert(/XSS/)// "onmouseover=alert(/XSS/)// Then go on any page of the frontend to trigger the XSS (which may require some user interaction depending on the payload/theme used)
Affects Plugins
Fixed in version 2.1.2
References
Classification
Miscellaneous
Original Researcher
Asif Nawaz Minhas
Submitter
Asif Nawaz Minhas
Verified
Yes
Timeline
Publicly Published
2021-08-30 (about 8 months ago)
Added
2021-08-30 (about 8 months ago)
Last Updated
2021-08-30 (about 8 months ago)