CVE-2022-31736
Critical
Published: 22 December 2022
Published
22 December 2022
Modified
15 April 2025
KEV Added
—
Patch
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CVSS Score v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0041
61.6th percentile
Risk Priority
20
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2022-31736 is a critical-severity Permissive Cross-domain Security Policy with Untrusted Domains (CWE-942) vulnerability in Mozilla Firefox. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 38.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-53134
Vulnerability details
A malicious website could have learned the size of a cross-origin resource that supported Range requests. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
mozilla
firefox
≤ 101
mozilla
firefox esr
≤ 91.10
mozilla
thunderbird
≤ 91.10
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.