CVE-2025-1020Critical· 9.8▾ MidnightMemory safety bugs present in Firefox 134 and Thunderbird 134. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerabili…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.5%
Last analysed / modified upstream
Memory safety bugs present in Firefox 134 and Thunderbird 134. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 135 and Thunderbird 135.
firefox < 135.0thunderbird >= 131.0, < 135.0Upgrade past the affected range:
firefox 135.0thunderbird 135.0Connected by shared product, vendor, weakness, or advisory.
CVE-2025-1016Critical· 9.8Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6
CVE-2025-1017Critical· 9.8Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and Thunderbird 128.6
CVE-2025-1018Medium· 5.3The fullscreen notification is prematurely hidden when fullscreen is re-requested quickly by the user
CVE-2025-1019Medium· 4.3The z-order of the browser windows could be manipulated to hide the fullscreen notification
CVE-2025-1014High· 8.8Certificate length was not properly checked when added to a certificate store
CVE-2025-1011High· 8.8A bug in WebAssembly code generation could have lead to a crash