CVE-2021-23980
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I. Basic Information for CVE-2021-23980
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
A mutation XSS affects users calling bleach.clean with all of: svg or math in the allowed tags p or br in allowed tags style, title, noscript, script, textarea, noframes, iframe, or xmp in allowed tags the keyword argument strip_comments=False Note: none of the above tags are in the default allowed tags and strip_comments defaults to True.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Python Bleach 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Python Bleach是一款基于Python的HTML清理库。 Python Bleach 存在跨站脚本漏洞，攻击者可利用该漏洞可以触发跨站点脚本，以便在网站上下文中运行JavaScript代码。
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 |
|---|---|---|---|---|
| Mozilla | Mozilla Bleach | unspecified ~ 3.3.0 | - |
II. Public POCs for CVE-2021-23980
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mozilla · 2023-02-16 · 5 CVEs total
| CVE-2019-17003 | Mozilla Firefox 跨站脚本漏洞 | |
| CVE-2020-12413 | Mozilla Firefox 信息泄露漏洞 | |
| CVE-2020-6817 | Python Bleach 安全漏洞 | |
| CVE-2021-43529 | Mozilla Thunderbird 缓冲区错误漏洞 |
IV. Related Vulnerabilities
Same vendor: Mozilla
- CVE-2026-8093
Memory safety bugs fixed in Thunderbird 150.0.2 - CVE-2026-8094
Other issue in the WebRTC component - CVE-2026-8092
Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thu - CVE-2026-8091
Incorrect boundary conditions in the Audio/Video: Playback c - CVE-2026-8090
Use-after-free in the DOM: Networking component
V. Comments for CVE-2021-23980
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