CVE-2020-26239
High
Description
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.
SeverityHigh
CVSS7.6
Exploit probability—
ProductScratchaddons Scratch Addons
PublishedNov 23, 2020
First seenNov 23, 2020
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- scratchaddons scratch_addons1.3.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| scratchaddons scratch_addons | v < 1.3.2 | 1.3.2 |
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