CVE-2020-26977

MEDIUM

Firefox < 84.0 - URL Spoofing via Unresponsive Port Connection

Title source: llm
STIX 2.1

Description

By attempting to connect a website using an unresponsive port, an attacker could have controlled the content of a tab while the URL bar displayed the original domain. *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84.

References (2)

Core 2
Core References
Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1676311

Scores

CVSS v3 6.5
EPSS 0.0038
EPSS Percentile 59.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Details

Status published
Products (1)
mozilla/firefox < 84.0
Published Jan 07, 2021
Tracked Since Feb 18, 2026