CVE-2022-22743

4.3 mediumEPSS 0.7%

Medium (4.3) in mozilla. EPSS 0.7% chance of exploitation in the next 30 days.

When navigating from inside an iframe while requesting fullscreen access, an attacker-controlled tab could have made the browser unable to leave fullscreen mode. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.

Severity

CVSS 3.1

4.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
Published: 2022-12-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox
mozilla:firefox_esr
mozilla:thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1739220
https://www.mozilla.org/security/advisories/mfsa2022-01/
https://www.mozilla.org/security/advisories/mfsa2022-02/
https://www.mozilla.org/security/advisories/mfsa2022-03/
https://bugzilla.mozilla.org/show_bug.cgi?id=1739220

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