Vulnerability in Mozilla Firefox
CVE-2021-23982
Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.007 (53.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.0% 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
- www.mozilla.org/security/advisories/mfsa2021-10/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2021-12/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2021-11/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-23982?
- CVE-2021-23982 is a medium-severity vulnerability in Mozilla Firefox, classified under Inadequate Encryption Strength. CVSS score: 6.5/10. Published 2021-03-31.
- How severe is CVE-2021-23982?
- Medium severity. CVSS v3 base score is 6.5 out of 10.