🛡️ CVE-2022-22743 on Debian — firefox-esr

⚪ Unknown ✅ No Known Exploit OSV

N/A

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.

Distribution advisory

This page covers CVE-2022-22743 as tracked by Debian, for the package firefox-esr. The fix is available in version 91.5.0esr-1; earlier versions remain affected.

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

DEBIAN-CVE-2022-22743 is recorded against 2 packages.

firefox-esr (fixed in 91.5.0esr-1)
thunderbird (fixed in 1:91.5.0-1)

Timeline and source

Published on 22 December 2022 and last revised on 4 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security-tracker.debian.org (Advisory)

CVE-2022-22743 on other distributions

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

Base record Ubuntu

Details

Severity Unknown

CVSS Score N/A

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 OSV

Published 2022-12-22

Updated 2026-08-12

Modified 2026-08-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
firefox-esr	—	91.5.0esr-1
thunderbird	—	1:91.5.0-1

References

ADVISORY https://security-tracker.debian.org/tracker/CVE-2022-22743

🔗 NVD 🔗 Mitre

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