Mozilla Firefox vulnerabilities

3,197 known vulnerabilities affecting mozilla/firefox.

Total CVEs
3,197
CISA KEV
17
actively exploited
Public exploits
122
Exploited in wild
22
Severity breakdown
CRITICAL865HIGH944MEDIUM1312LOW71UNKNOWN5

Vulnerabilities

Page 154 of 160
CVE-2021-43529CRITICALCVSS 9.8
CVE-2021-43529 [CRITICAL] Mozilla Foundation Security Advisory 2021-50: CVE-2021-43529 Mozilla Foundation Security Advisory 2021-50 CVE: CVE-2021-43529 Product: Thunderbird Impact: high Fixed in: Thunderbird 91.3
mozilla
CVE-2021-29978CRITICALCVSS 9.8
CVE-2021-29978 [CRITICAL] Mozilla Foundation Security Advisory 2021-31: CVE-2021-29978 Mozilla Foundation Security Advisory 2021-31 CVE: CVE-2021-29978 Product: Mozilla VPN Impact: low Fixed in: Mozilla VPN 2.3
mozilla
CVE-2020-15999CRITICALCVSS 9.6KEV
CVE-2020-15999 [CRITICAL] Mozilla Foundation Security Advisory 2020-52: CVE-2020-15999 Mozilla Foundation Security Advisory 2020-52 CVE: CVE-2020-15999 Product: Thunderbird Impact: high Fixed in: Thunderbird 78.5
mozilla
CVE-2026-6768CRITICALCVSS 9.8fixed in Firefox 150
CVE-2026-6768 [CRITICAL] Mozilla Foundation Security Advisory 2026-30: CVE-2026-6768 Mozilla Foundation Security Advisory 2026-30 CVE: CVE-2026-6768 Product: Firefox Impact: high Fixed in: Firefox 150
mozilla
CVE-2021-4127CRITICALCVSS 9.8
CVE-2021-4127 [CRITICAL] Mozilla Foundation Security Advisory 2021-12: CVE-2021-4127 Mozilla Foundation Security Advisory 2021-12 CVE: CVE-2021-4127 Product: Thunderbird Impact: high Fixed in: Thunderbird 78.9
mozilla
CVE-2021-29954CRITICALCVSS 9.8
CVE-2021-29954 [CRITICAL] Mozilla Foundation Security Advisory 2021-21: CVE-2021-29954 Mozilla Foundation Security Advisory 2021-21 CVE: CVE-2021-29954 Product: Hubs Cloud Impact: critical Fixed in: Hubs Cloud mozillareality/reticulum/1.0.1/20210428201255
mozilla
CVE-2024-43097HIGHCVSS 7.8
CVE-2024-43097 [HIGH] Mozilla Foundation Security Advisory 2025-15: CVE-2024-43097 Mozilla Foundation Security Advisory 2025-15 CVE: CVE-2024-43097 Product: Firefox ESR Impact: high Fixed in: Firefox ESR 115.21
mozilla
CVE-2026-6773HIGHCVSS 7.5fixed in Firefox 150
CVE-2026-6773 [HIGH] Mozilla Foundation Security Advisory 2026-30: CVE-2026-6773 Mozilla Foundation Security Advisory 2026-30 CVE: CVE-2026-6773 Product: Firefox Impact: high Fixed in: Firefox 150
mozilla
CVE-2023-25746HIGHCVSS 8.8
CVE-2023-25746 [HIGH] Mozilla Foundation Security Advisory 2023-07: CVE-2023-25746 Mozilla Foundation Security Advisory 2023-07 CVE: CVE-2023-25746 Product: Thunderbird Impact: high Fixed in: Thunderbird 102.8
mozilla
CVE-2022-39249HIGHCVSS 7.5
CVE-2022-39249 [HIGH] Mozilla Foundation Security Advisory 2022-43: CVE-2022-39249 Mozilla Foundation Security Advisory 2022-43 CVE: CVE-2022-39249 Product: Thunderbird Impact: moderate Fixed in: Thunderbird 102.3.1
mozilla
CVE-2025-3909HIGHCVSS 8.1
CVE-2025-3909 [HIGH] Mozilla Foundation Security Advisory 2025-34: CVE-2025-3909 Mozilla Foundation Security Advisory 2025-34 CVE: CVE-2025-3909 Product: Thunderbird Impact: low Fixed in: Thunderbird 128.10.1
mozilla
CVE-2025-26696HIGHCVSS 7.0
CVE-2025-26696 [HIGH] Mozilla Foundation Security Advisory 2025-18: CVE-2025-26696 Mozilla Foundation Security Advisory 2025-18 CVE: CVE-2025-26696 Product: Thunderbird Impact: high Fixed in: Thunderbird 128.8
mozilla
CVE-2023-28427HIGHCVSS 8.2
CVE-2023-28427 [HIGH] Mozilla Foundation Security Advisory 2023-12: CVE-2023-28427 Mozilla Foundation Security Advisory 2023-12 CVE: CVE-2023-28427 Product: Thunderbird Impact: high Fixed in: Thunderbird 102.9.1
mozilla
CVE-2022-39251HIGHCVSS 8.6
CVE-2022-39251 [HIGH] Mozilla Foundation Security Advisory 2022-43: CVE-2022-39251 Mozilla Foundation Security Advisory 2022-43 CVE: CVE-2022-39251 Product: Thunderbird Impact: moderate Fixed in: Thunderbird 102.3.1
mozilla
CVE-2025-59375HIGHCVSS 7.5
CVE-2025-59375 [HIGH] Mozilla Foundation Security Advisory 2026-24: CVE-2025-59375 Mozilla Foundation Security Advisory 2026-24 CVE: CVE-2025-59375 Product: Thunderbird Impact: high Fixed in: Thunderbird 140.9
mozilla
CVE-2023-6862HIGHCVSS 8.8
CVE-2023-6862 [HIGH] Mozilla Foundation Security Advisory 2023-54: CVE-2023-6862 Mozilla Foundation Security Advisory 2023-54 CVE: CVE-2023-6862 Product: Firefox ESR Impact: high Fixed in: Firefox ESR 115.6
mozilla
CVE-2022-3155HIGHCVSS 7.8
CVE-2022-3155 [HIGH] Mozilla Foundation Security Advisory 2022-42: CVE-2022-3155 Mozilla Foundation Security Advisory 2022-42 CVE: CVE-2022-3155 Product: Thunderbird Impact: high Fixed in: Thunderbird 102.3
mozilla
CVE-2020-16044HIGHCVSS 8.8
CVE-2020-16044 [HIGH] Mozilla Foundation Security Advisory 2021-01: CVE-2020-16044 Mozilla Foundation Security Advisory 2021-01 CVE: CVE-2020-16044 Product: Firefox, Firefox ESR, Firefox for Android Impact: critical Fixed in: Firefox 84.0.2 Firefox ESR 78.6.1 Firefox for Android 84.1.3
mozilla
CVE-2020-15669HIGHCVSS 8.8
CVE-2020-15669 [HIGH] Mozilla Foundation Security Advisory 2020-37: CVE-2020-15669 Mozilla Foundation Security Advisory 2020-37 CVE: CVE-2020-15669 Product: Firefox ESR Impact: high Fixed in: Firefox ESR 68.12
mozilla
CVE-2020-15969HIGHCVSS 8.8
CVE-2020-15969 [HIGH] Mozilla Foundation Security Advisory 2020-47: CVE-2020-15969 Mozilla Foundation Security Advisory 2020-47 CVE: CVE-2020-15969 Product: Thunderbird Impact: high Fixed in: Thunderbird 78.4
mozilla
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