What’s Vulnerable › Vulnerabilities

CVE-2023-29547

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-06-02 · updated 2026-06-17

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.

Affected products

• Mozilla Firefox: before 112.0 — fixed in 112.0
• Mozilla Firefox ESR: before 102.10 — fixed in 102.10
• Mozilla Focus: before 112.0 — fixed in 112.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 112.0; Mozilla Firefox ESR 102.10; Mozilla Focus 112.0. Check the vendor advisory for mitigations.

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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