EmbedPress < 3.9.2 - Reflected XSS

2023-11-2000:00:00

Erwan LR (WPScan)

wpscan.com

embedpress

plugin

reflected xss

unsanitised parameter

specific content

high privilege users

admin

security vulnerability

6.2 Medium

AI Score

Confidence

High

0.0005 Low

EPSS

Percentile

17.1%

JSON

Description The plugin does not sanitise and escape a parameter before outputting it back in the page containing a specific content, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

PoC

On a post/page where containing the following output (which can be as txt in the post content): “id”:““customThumbnail”:”", make a logged in admin open the URL below: https://example.com/related-page-post/?hash=*(?:'>)*