Vulnerability Details : CVE-2021-29974
When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgraded to HTTPS automatically. This vulnerability affects Firefox < 90.
Exploit prediction scoring system (EPSS) score for CVE-2021-29974
Probability of exploitation activity in the next 30 days: 0.10%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 39 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-29974
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
2.6
|
LOW | AV:N/AC:H/Au:N/C:N/I:P/A:N |
4.9
|
2.9
|
NIST |
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
2.8
|
1.4
|
NIST |
References for CVE-2021-29974
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1704843
Access DeniedIssue Tracking;Vendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2021-28/
Security Vulnerabilities fixed in Firefox 90 — MozillaVendor Advisory
-
https://security.gentoo.org/glsa/202202-03
Mozilla Firefox: Multiple vulnerabilities (GLSA 202202-03) — Gentoo securityThird Party Advisory
Products affected by CVE-2021-29974
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*