CVE-2021-43542
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I. Basic Information for CVE-2021-43542
Vulnerability Information
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Vulnerability Title
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Description
Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
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 ESR 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Firefox ESR是美国Mozilla基金会的Firefox(Web浏览器)的一个延长支持版本。 Mozilla Firefox ESR存在信息泄露漏洞，该漏洞源于使用XMLHttpRequest，攻击者可利用该漏洞可以通过探测加载外部协议的错误消息来识别已安装的应用程序。此漏洞影响雷鸟< 91.4.0,Firefox ESR < 91.4.0和Firefox < 95。
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 | Thunderbird | unspecified ~ 91.4.0 | - | |
| Mozilla | Firefox ESR | unspecified ~ 91.4.0 | - | |
| Mozilla | Firefox | unspecified ~ 95 | - |
II. Public POCs for CVE-2021-43542
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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- https://bugzilla.mozilla.org/show_bug.cgi?id=1723281x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2021-54/x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2021-52/x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2021-53/x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2021-43542
Same Patch Batch · Mozilla · 2021-12-08 · 27 CVEs total
| CVE-2021-43534 | Mozilla Firefox 缓冲区错误漏洞 | |
| CVE-2021-43527 | Mozilla Network Security Services 缓冲区错误漏洞 | |
| CVE-2021-43546 | Mozilla Firefox 安全漏洞 | |
| CVE-2021-43545 | Mozilla Firefox 安全漏洞 | |
| CVE-2021-43544 | Mozilla Firefox 跨站脚本漏洞 | |
| CVE-2021-43543 | Mozilla Firefox 跨站脚本漏洞 | |
| CVE-2021-43541 | Mozilla Firefox ESR 安全漏洞 | |
| CVE-2021-43540 | Mozilla Firefox 权限许可和访问控制问题漏洞 | |
| CVE-2021-43539 | Mozilla Firefox ESR 资源管理错误漏洞 | |
| CVE-2021-43538 | Mozilla Firefox 竞争条件问题漏洞 | |
| CVE-2021-43537 | Mozilla Firefox ESR 代码问题漏洞 | |
| CVE-2021-43536 | Mozilla Firefox ESR 信息泄露漏洞 | |
| CVE-2021-43535 | Mozilla Firefox 资源管理错误漏洞 | |
| CVE-2021-38503 | Mozilla Firefox 安全特征问题漏洞 | |
| CVE-2021-43533 | Mozilla Firefox 安全漏洞 | |
| CVE-2021-43532 | Mozilla Firefox 输入验证错误漏洞 | |
| CVE-2021-43531 | Mozilla Firefox 访问控制错误漏洞 | |
| CVE-2021-43530 | Mozilla Firefox 跨站脚本漏洞 | |
| CVE-2021-43528 | Mozilla Thunderbird 安全特征问题漏洞 | |
| CVE-2021-38510 | Mozilla Firefox 命令注入漏洞 |
Showing top 20 of 27 CVEs. View all on vendor page → →
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-2021-43542
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