Vulnerability Details : 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.
Products affected by CVE-2020-6813
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-6813
0.09%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 35 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-6813
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
3.9
|
1.4
|
NIST |
References for CVE-2020-6813
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1605814
Access DeniedPermissions Required;Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2020-08/
Security Vulnerabilities fixed in Firefox 74 — MozillaVendor Advisory
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