Vulnerability in Mozilla Firefox
CVE-2021-38497
Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.
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: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · 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/mfsa2021-47/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2021-45/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2021-43/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-38497?
- CVE-2021-38497 is a medium-severity vulnerability in Mozilla Firefox, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2021-11-03.
- How severe is CVE-2021-38497?
- Medium severity. CVSS v3 base score is 6.5 out of 10.