CVE-2021-23984

CVE Details

Release Date:	2021-03-31
Impact:	None	What is this?

Description

A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Thunderbird < 78.9, and Firefox < 87.

See more information about CVE-2021-23984 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	6.5
Vector String:	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Version:	3.0
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	Required
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	High
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (firefox)	ELSA-2021-0992	2021-03-25
Oracle Linux version 7 (thunderbird)	ELSA-2021-0996	2021-03-26
Oracle Linux version 8 (firefox)	ELSA-2021-0990	2021-03-26
Oracle Linux version 8 (thunderbird)	ELSA-2021-0993	2021-03-26