Description

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.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1657916

https://www.mozilla.org/security/advisories/mfsa2020-54/

https://www.mozilla.org/security/advisories/mfsa2020-55/

https://www.mozilla.org/security/advisories/mfsa2020-56/

Details

Risk Information

CVSS v2

CVSS v3