Vulnerability in Mozilla Firefox
CVE-2020-6813
When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an attacker to inject arbitrary styles, bypassing the intent of the Content Security Policy. This vulnerability affects Firefox < 74.
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:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.012 (67.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000
Affected products
- Mozilla Firefox — versions unspecified
Public proof-of-concept exploits
References
- www.mozilla.org/security/advisories/mfsa2020-08/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-6813?
- CVE-2020-6813 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 5.3/10. Published 2020-03-25.
- How severe is CVE-2020-6813?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2020-6813 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.