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cve/2021/CVE-2021-43542.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
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CVE-2021-43542

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.

POC

Reference

Github

No PoCs found on GitHub currently.