CVE Vulnerability

CVE-2021-23984

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, Firefox < 87, and Thunderbird < 78.9.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.mozilla.org/security/advisories/mfsa2021-11/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-12/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-10/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1693664 Issue Tracking Vendor Advisory
Configurations

Configuration 1

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Information

Published : 2021-03-31 02:15

Updated : 2021-08-06 06:18

NVD link : CVE-2021-23984

Mitre link : CVE-2021-23984

Products Affected
No products.
CWE
CWE-290

Authentication Bypass by Spoofing