Simple Banner < 2.10.4 - Authenticated Stored XSS
Description
The plugin does not sanitise and escape one of its settings, allowing high privilege users such as admin to use Cross-Site Scripting payload even when the unfiltered_html capability is disallowed.
Proof of Concept
Put the following payload in the Simple Banner Text setting of the plugin: <img src onerror=alert(/XSS/)> The XSS will be triggered in the plugin's settings, as well as any frontend page with the banner
Affects Plugins
Fixed in version 2.10.4✓
Classification
Miscellaneous
Original Researcher
Asif Nawaz Minhas
Submitter
Asif Nawaz Minhas
Verified
Yes
Timeline
Publicly Published
2021-07-26 (about 2 months ago)
Added
2021-07-26 (about 2 months ago)
Last Updated
2021-08-10 (about 2 months ago)