CVE-2020-26239

2020-11-2319:15:11

Google

osv.dev

scratch addons

webextension

chrome

firefox

dom-based xss

more links

html-escaped

unescaped

xss

automatic update

browser

disabled

AI Score

6.7

Confidence

High

EPSS

0.001

Percentile

31.7%

JSON

Scratch Addons is a WebExtension that supports both Chrome and Firefox. Scratch Addons before version 1.3.2 is vulnerable to DOM-based XSS. If the victim visited a specific website, the More Links addon of the Scratch Addons extension used incorrect regular expression which caused the HTML-escaped values to be unescaped, leading to XSS. Scratch Addons version 1.3.2 fixes the bug. The extension will be automatically updated by the browser. More Links addon can be disabled via the option of the extension.