CVE-2021-38491

MEDIUM 6.5CVE-2021-38491 · Published 03/11/2021 · updated 17/06/2026

In short

CVE-2021-38491 is a MEDIUM (CVSS 6.5) vulnerability affecting firefox (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.88%, higher than 59.1% of all vulnerabilities.
Fix: update to 92.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 92.0`	`92.0`

Mixed-content checks were unable to analyze opaque origins which led to some mixed content being loaded. This vulnerability affects Firefox < 92.

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Package

Affected versions

Patched versions

< 92.0

92.0

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