Vulnerability Database

310,057

Total vulnerabilities in the database

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.

  • Published: Jan 7, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2020-35111
  • Severity: Low
  • Exploit:

CVSS v3:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS v2:

  • Severity: Low
  • Score: 4.3
  • AV:N/AC:M/Au:N/C:P/I:N/A:N

No CWE or OWASP classifications available.

Software From Fixed in
mozilla / firefox_esr - 78.6.0
mozilla / thunderbird - 78.6.0
mozilla / firefox - 84.0