vulnerability
MFSA2025-11 Thunderbird: Security Vulnerabilities fixed in Thunderbird 135 (CVE-2025-1018)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:P/A:N) | Feb 4, 2025 | Feb 5, 2025 | Apr 15, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
Feb 4, 2025
Added
Feb 5, 2025
Modified
Apr 15, 2026
Description
The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user. This could have been leveraged to perform a potential spoofing attack. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
Solution
mozilla-thunderbird-upgrade-135_0
Rapid7 Labs
2026 Global Threat Landscape Report
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