WordPress Plugin Vulnerabilities
underConstruction < 1.21 - Admin+ Stored Cross-Site Scripting
Description
The plugin does not sanitise or escape the "Display a custom page using your own HTML" setting before outputting it, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiletred_html capability is disallowed.
Proof of Concept
In the plugin's settings, active Under Contraction feature, select "Display a custom page using your own HTML" then put the following payload in the "Under Construction Page HTML" field: <svg onload=alert(/XSS/)> The XSS will be triggered in the homepage (when viewed as non admin)
Affects Plugins
Fixed in version 1.21
References
Classification
Miscellaneous
Original Researcher
Asif Nawaz Minhas
Submitter
Asif Nawaz Minhas
Verified
Yes
Timeline
Publicly Published
2022-05-26 (about 6 months ago)
Added
2022-05-26 (about 6 months ago)
Last Updated
2022-08-02 (about 4 months ago)