Vulnerability in Mozilla Firefox
CVE-2024-9398
By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (44.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified, 129.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2024-46/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-47/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-49/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-50/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-9398?
- CVE-2024-9398 is a medium-severity vulnerability in Mozilla Firefox, classified under Observable Discrepancy. CVSS score: 5.3/10. Published 2024-10-01.
- How severe is CVE-2024-9398?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2024-9398 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.