Vulnerability Monitor

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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.

Published

2021-03-31T14:15:19.170

Last Modified

2024-11-21T05:52:09.310

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.5 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-290

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 87.0	Yes
Application	mozilla	firefox_esr	< 78.9	Yes
Application	mozilla	thunderbird	< 78.9	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1693664 Issue Tracking, Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-10/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-11/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2021-12/ Vendor Advisory ([email protected])
https://bugzilla.mozilla.org/show_bug.cgi?id=1693664 Issue Tracking, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-10/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-11/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.mozilla.org/security/advisories/mfsa2021-12/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)