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CVE-2025-1020: Memory safety bugs present in Firefox 134 and Thunderbird 134. Some of these bugs showed evidence of memory corruption and we presume that with...
Description
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 affects Firefox < 135 and Thunderbird < 135.
Classification
CVE ID: CVE-2025-1020
Affected Products
Vendor: Mozilla
Product: Firefox
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.07% (probability of being exploited)
EPSS Percentile: 32.91% (scored less or equal to compared to others)
EPSS Date: 2025-03-05 (when was this score calculated)
References
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1939063%2C1942169https://www.mozilla.org/security/advisories/mfsa2025-07/
https://www.mozilla.org/security/advisories/mfsa2025-11/