CVEvulnerability
CVE-2020-35111
4.3 MEDIUM
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- Status
- Modified
- Published
- 2021-01-07
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
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.
Affected configurations
• mozilla firefox (< 84.0)
• mozilla firefox esr (< 78.6.0)
• mozilla thunderbird (< 78.6.0)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1657916 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-54/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-55/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-56/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1657916 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2020-54/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-55/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-56/ Vendor Advisory