Mozilla Firefox (en-US) 99.0
Mozilla Firefox (en-US) 99.0, released April 5, 2022, fixes 10 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Firefox (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 Firefox (en-US) | 99.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2022-28281 | Mozilla Thunderbird and 4 others: Out-of-bounds Write | 8.8 | 0.0278 | None reported |
| High | CVE-2022-28282 | Mozilla Thunderbird and 4 others: Use After Free | 8.8 | 0.0218 | None reported |
| High | CVE-2022-1097 | Mozilla Thunderbird and 4 others: Use After Free | 8.8 | 0.0095 | None reported |
| High | CVE-2022-28285 | Mozilla Thunderbird and 4 others: Out-of-bounds Read | 8.8 | 0.0079 | None reported |
| High | CVE-2022-28289 | Mozilla Thunderbird and 4 others: Out-of-bounds Write | 8.8 | 0.0074 | None reported |
| High | CVE-2022-28284 | Mozilla Firefox ESR and 2 others: Improper Encoding or Escaping of Output | 8.8 | 0.0059 | None reported |
| High | CVE-2022-28286 | Mozilla Thunderbird and 4 others: Improper Restriction of Rendered UI Layers or Frames | 8.8 | 0.0058 | None reported |
| High | CVE-2022-28288 | Mozilla Firefox ESR and 2 others: Out-of-bounds Write | 8.8 | 0.0056 | None reported |
| Routine | CVE-2022-28283 | Mozilla Firefox ESR and 2 others: Files or Directories Accessible to External Parties | 6.5 | 0.0060 | None reported |
| Routine | CVE-2022-28287 | Mozilla Firefox ESR and 2 others: Improper Control of a Resource Through its Lifetime | 6.5 | 0.0057 | None reported |
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