Mozilla Thunderbird (en-US) 91.3.0
Mozilla Thunderbird (en-US) 91.3.0, released November 1, 2021, fixes 10 CVEs in Mozilla Thunderbird (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Thunderbird (en-US) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Thunderbird (en-US) is 159.0, which also fixes every CVE on this page. Install that instead.
Priority of the 10 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Thunderbird (en-US) | 91.3.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2021-38503 | Mozilla Firefox ESR and 3 others: The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass… | 10.0 | 0.0412 | None reported |
| High | CVE-2021-38504 | Mozilla Firefox ESR and 3 others: When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free… | 9.8 | 0.0177 | None reported |
| High | CVE-2021-38506 | Mozilla Firefox ESR and 3 others: Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning… | 7.5 | 0.0151 | None reported |
| High | CVE-2021-43534 | Mozilla Firefox ESR and 3 others: Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox… | 8.8 | 0.0125 | None reported |
| High | CVE-2021-43535 | Mozilla Firefox ESR and 3 others: A use-after-free could have occured when an HTTP2 session object was released on a different thread,… | 8.8 | 0.0115 | None reported |
| High | CVE-2021-38507 | Mozilla Firefox ESR and 3 others: The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded… | 7.5 | 0.0083 | None reported |
| High | CVE-2021-43529 | Mozilla Thunderbird and 1 other: Out-of-bounds Write | 9.8 | 0.0047 | None reported |
| Routine | CVE-2021-38509 | Mozilla Firefox ESR and 3 others: Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary… | 6.1 | 0.0176 | None reported |
| Routine | CVE-2021-38508 | Mozilla Firefox ESR and 3 others: By displaying a form validity message in the correct location at the same time as a permission prompt… | 6.1 | 0.0164 | None reported |
| Routine | CVE-2021-38505 | Mozilla Firefox ESR and 3 others: Microsoft introduced a new feature in Windows 10 known as Cloud Clipboard which, if enabled, will record… | 6.5 | 0.0108 | None reported |
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