CVE-2023-29547

Name: CVE-2023-29547
Creator: NVD / NIST
Published: 2023-06-02T17:15:12.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2023-29547 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.47%

37.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 112.0
Mozilla	Firefox Esr	< 102.10
Mozilla	Focus	< 112.0

References

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

Timeline

Published: Jun 2, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-29547?

How severe is CVE-2023-29547?

CVE-2023-29547 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2023-29547?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-29547?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST