CVE-2023-29534
CVE-2023-29534 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- EPSS exploit prediction: 1% (49th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Mozilla Firefox
- Published:
- Last modified:
Description
Different techniques existed to obscure the fullscreen notification in Firefox and Focus for Android. These could have led to potential user confusion and spoofing attacks. *This bug only affects Firefox and Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox for Android < 112 and Focus for Android < 112.
Frequently asked questions
- What is CVE-2023-29534?
- Different techniques existed to obscure the fullscreen notification in Firefox and Focus for Android. These could have led to potential user confusion and spoofing attacks. *This bug only affects Firefox and Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox for Android < 112 and Focus for Android < 112.
- How severe is CVE-2023-29534?
- CVE-2023-29534 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2023-29534 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-29534?
- CVE-2023-29534 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-29534?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2023-29534 published?
- CVE-2023-29534 was published on 2023-06-19 and last updated on 2026-06-17.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1816007
- https://bugzilla.mozilla.org/show_bug.cgi?id=1816059
- https://bugzilla.mozilla.org/show_bug.cgi?id=1821155
- https://bugzilla.mozilla.org/show_bug.cgi?id=1821576
- https://bugzilla.mozilla.org/show_bug.cgi?id=1821906
- https://bugzilla.mozilla.org/show_bug.cgi?id=1822298
- https://bugzilla.mozilla.org/show_bug.cgi?id=1822305
- https://www.mozilla.org/security/advisories/mfsa2023-13/
Affected products (2)
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*
- cpe:2.3:a:mozilla:firefox_focus:*:*:*:*:*:android:*:*
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