Mozilla Thunderbird ESR (it) 140.4.0
Mozilla Thunderbird ESR (it) 140.4.0, released October 14, 2025, fixes 6 CVEs in Mozilla Thunderbird ESR (it). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird ESR (it) is 153.7.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Thunderbird ESR (it) is 153.7.0, which also fixes every CVE on this page. Install that instead.
Priority of the 6 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Thunderbird ESR (it) | 140.4.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2025-11708 | Use-after-free in MediaTrackGraphImpl::GetInstance() | 9.8 | 0.0051 | None reported |
| High | CVE-2025-11710 | Cross-process information leaked due to malicious IPC messages | 9.8 | 0.0042 | None reported |
| High | CVE-2025-11714 | Memory safety bugs fixed in Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144 | 8.8 | 0.0034 | None reported |
| High | CVE-2025-11713 | Potential user-assisted code execution in “Copy as cURL” command | 8.1 | 0.0029 | None reported |
| High | CVE-2025-11711 | Some non-writable Object properties could be modified | 7.5 | 0.0023 | None reported |
| High | CVE-2025-11712 | An OBJECT tag type attribute overrode browser behavior on web resources without a content-type | 7.5 | 0.0022 | None reported |
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