🛡️ CVE-2022-22743 — firefox

🟡 CVSS 4.3 — Medium ✅ No Known Exploit NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Affected software

CVE-2022-22743 is recorded against 3 packages.

  • firefox (fixed in 96.0)
  • firefox-esr (fixed in 91.5)
  • thunderbird (fixed in 91.5)

Timeline and source

Published on 22 December 2022 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

bugzilla.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
bugzilla.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org

CVE-2022-22743 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2022-12-22
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
firefox — 96.0
firefox-esr — 91.5
thunderbird — 91.5

Similar Threats

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