CVE-2021-4221
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I. Basic Information for CVE-2021-4221
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
If a domain name contained a RTL character, it would cause the domain to be rendered to the right of the path. This could lead to user confusion and spoofing attacks. <br>*This bug only affects Firefox for Android. Other operating systems are unaffected.*<br>*Note*: Due to a clerical error this advisory was not included in the original announcement, and was added in Feburary 2022. This vulnerability affects Firefox < 92.
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
Mozilla Firefox 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox是美国Mozilla基金会的一款开源Web浏览器。 Mozilla Firefox 92之前版本存在安全漏洞，该漏洞源于如果域名包含RTL字符，会导致域呈现在路径的右侧，这可能会导致用户混淆和欺骗攻击。
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
II. Public POCs for CVE-2021-4221
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Mozilla · 2022-12-22 · 175 CVEs total
| CVE-2022-36319 | Mozilla Firefox 安全漏洞 | |
| CVE-2022-34481 | Mozilla Firefox 输入验证错误漏洞 | |
| CVE-2022-34482 | Mozilla Firefox 安全漏洞 | |
| CVE-2022-34483 | Mozilla Firefox 安全漏洞 | |
| CVE-2022-34484 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2022-34485 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2022-36314 | Mozilla Firefox 代码问题漏洞 | |
| CVE-2022-36315 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2022-36316 | Mozilla Firefox 输入验证错误漏洞 | |
| CVE-2022-36317 | Mozilla Firefox 输入验证错误漏洞 | |
| CVE-2022-36318 | Mozilla Firefox 竞争条件问题漏洞 | |
| CVE-2022-38475 | Mozilla Firefox 安全漏洞 | |
| CVE-2022-40957 | Mozilla Firefox 安全漏洞 | |
| CVE-2022-40956 | Mozilla Firefox 跨站脚本漏洞 | |
| CVE-2022-38478 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2022-38477 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2022-38476 | Mozilla Firefox ESR 资源管理错误漏洞 | |
| CVE-2022-38473 | Mozilla Firefox 安全漏洞 | |
| CVE-2022-36320 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2022-38472 | Mozilla Firefox 访问控制错误漏洞 |
Showing top 20 of 175 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Firefox
- 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
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-2021-4221
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