8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
0.002 Low
EPSS
Percentile
52.1%
The Mozilla Foundation Security Advisory describes this flaw as: If a Thunderbird user quoted from an HTML email and the email contained either a video tag with the poster attribute or an object tag with a data attribute, a network request to the referenced remote URL was performed regardless of a configuration to block remote content, and an image loaded from the poster attribute was shown in the composer window. These issues could have given an attacker additional capabilities when targeting releases that did not yet have a fix for CVE-2022-3033.