Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 2
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Mozilla Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
|
— |
153.1.0
|
|
Mozilla Thunderbird
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
|
— |
153.1.0
|
References 5
https://bugzilla.mozilla.org/show_bug.cgi?id=2060048
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-74/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-77/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-78/
security@mozilla.org
https://www.mozilla.org/security/advisories/mfsa2026-80/
security@mozilla.org