CVE-2022-31744

MEDIUM 6.5CVE-2022-31744 · Published 22/12/2022 · updated 17/06/2026

In short

CVE-2022-31744 is a MEDIUM (CVSS 6.5) vulnerability affecting firefox (mozilla), firefox esr (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.62%, higher than 49.7% of all vulnerabilities.
Fix: update to 101.0, 91.11 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 101.0`	`101.0`
firefox esr mozilla	`< 91.11`	`91.11`
thunderbird mozilla	`< 91.11`	`91.11`

Description

An attacker could have injected CSS into stylesheets accessible via internal URIs, such as resource:, and in doing so bypass a page's Content Security Policy. This vulnerability affects Firefox ESR < 91.11, Thunderbird < 102, Thunderbird < 91.11, and Firefox < 101.

References

bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
mozilla.org/security/advisories/mfsa2022-20 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-25 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-26 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

< 101.0

101.0

firefox esr

mozilla

< 91.11

91.11

thunderbird

mozilla

< 91.11

91.11

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