Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2020-26239— Cross-Site Scripting in Scratch browser addons

Quick assessment

Affected
ScratchAddons ScratchAddons
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Scratch Addons是Scratch Addons社区的一款用于为浏览器提供主题更换功能的插件。该插件支持Chrome和Firefox浏览器。 Scratch Addons 存在跨站脚本漏洞，该漏洞源于使用了不正确的正则表达式，从而导致html转义值无法转义。

CVSS 7.6 · High EPSS 1.03% · P61

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2020-26239

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cross-Site Scripting in Scratch browser addons
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Scratch Addons 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Scratch Addons是Scratch Addons社区的一款用于为浏览器提供主题更换功能的插件。该插件支持Chrome和Firefox浏览器。 Scratch Addons 存在跨站脚本漏洞，该漏洞源于使用了不正确的正则表达式，从而导致html转义值无法转义。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ScratchAddons ScratchAddons < 1.3.2 -

II. Public POCs for CVE-2020-26239

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2020-26239

请登录查看更多情报信息。

Patches & Fixes for CVE-2020-26239 (1)

Vendor Advisories for CVE-2020-26239 (1)

Other References for CVE-2020-26239 (1)

IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2020-26239

No comments yet

Leave a comment