by Kastro
Paper/Archive/CVE-2025-0247

CVE-2025-0247

Mozilla Firefox — Memory safety bugs fixed in Firefox 134 and Thunderbird 134

EPSS 11%CVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 95.8.958 × 2019.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 134 and Thunderbird 134.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory134CNA
Thunderbirdsee advisory134CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refbugzilla.mozilla.org/buglist.cgi?bug_id=1835193%2C1910021%2C1919803%2C1931576%2C1931948%2C1932173refmozilla.org/security/advisories/mfsa2025-01refmozilla.org/security/advisories/mfsa2025-04