Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-43531

When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-2021-43532 but in the context of Web Extensions. This vulnerability affects Firefox < 94.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 34.7%
CVSS Severity
CVSS v3 Score 4.3
CVSS v2 Score 4.3
Products affected by CVE-2021-43531


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