Vulnerability Details : CVE-2020-35111
When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest callback was not triggered for view-source URLs. While web content cannot navigate to such URLs, a user opening View Source could have inadvertently leaked their IP address. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Exploit prediction scoring system (EPSS) score for CVE-2020-35111
Probability of exploitation activity in the next 30 days: 0.10%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 42 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-35111
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N |
8.6
|
2.9
|
NIST |
|
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
2.8
|
1.4
|
NIST |
References for CVE-2020-35111
-
https://www.mozilla.org/security/advisories/mfsa2020-56/
Security Vulnerabilities fixed in Thunderbird 78.6 — MozillaVendor Advisory
-
https://bugzilla.mozilla.org/show_bug.cgi?id=1657916
Access DeniedPermissions Required
-
https://www.mozilla.org/security/advisories/mfsa2020-55/
Security Vulnerabilities fixed in Firefox ESR 78.6 — MozillaVendor Advisory
-
https://www.mozilla.org/security/advisories/mfsa2020-54/
Security Vulnerabilities fixed in Firefox 84 — MozillaVendor Advisory
Products affected by CVE-2020-35111
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*