Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-43540

WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 57.7%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.3
Products affected by CVE-2021-43540


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