CVE-2021-29963

MEDIUM 4.3CVE-2021-29963 · Published 24/06/2021 · updated 17/06/2026

In short

CVE-2021-29963 is a MEDIUM (CVSS 4.3) vulnerability affecting firefox (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.33%, higher than 26.9% of all vulnerabilities.
Fix: update to 89.0 or later.

Package	Affected versions	Patched versions
firefox mozilla	`< 89.0`	`89.0`

Description

Address bar search suggestions in private browsing mode were re-using session data from normal mode. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2021-23 · Release Notes

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Package

Affected versions

Patched versions

firefox

mozilla

< 89.0

89.0

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