Vulnerability in Mozilla Firefox
CVE-2023-4583
When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox Esr
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2023-34/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-36/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2023-38/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2023-4583?
- CVE-2023-4583 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 7.5/10. Published 2023-09-11.
- How severe is CVE-2023-4583?
- High severity. CVSS v3 base score is 7.5 out of 10.