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

published January 7, 2021

CVSS
—
EPSS
1%
Percentile
72.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01432 · 72.9th percentile
Published
2021-01-07T13:50Z
EPSS history
Timeline
  • 07 JAN 13:50Z
    When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest callback was not triggered for view-source URLs
    cvelistv5