CVE-2023-29547

6.5 mediumEPSS 0.5%

Medium (6.5) in mozilla. EPSS 0.5% chance of exploitation in the next 30 days.

When a secure cookie existed in the Firefox cookie jar an insecure cookie for the same domain could have been created, when it should have silently failed. This could have led to a desynchronization in expected results when reading from the secure cookie. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
Published: 2023-06-02
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox
mozilla:firefox_esr
mozilla:focus

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1783536
https://www.mozilla.org/security/advisories/mfsa2023-13/
https://bugzilla.mozilla.org/show_bug.cgi?id=1783536
https://www.mozilla.org/security/advisories/mfsa2023-13/

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