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I. Basic Information for CVE-2020-26239
Vulnerability Information

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Vulnerability Title
Cross-Site Scripting in Scratch browser addons
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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
VendorProductAffected VersionsCPESubscribe
ScratchAddonsScratchAddons < 1.3.2 -
II. Public POCs for CVE-2020-26239
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III. Intelligence Information for CVE-2020-26239
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