WebP & SVG Support <= 1.4.0 - Author+ Stored XSS via SVG

2024-06-0500:00:00

Bob Matyas

wpscan.com

webp support

svg support

version 1.4.0

author role

stored xss

malicious upload

sanitise

wordpress plugin

6.2 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.1%

JSON

Description The plugin does not sanitise uploaded SVG files, which could allow users with a role as low as Author to upload a malicious SVG containing XSS payloads.

PoC

Upload an SVG with the following markup: Load the SVG and see the XSS. Code reference: https://plugins.trac.wordpress.org/browser/webp-svg-support/trunk/core/bootstrap.php#L111