CVE-2020-26950
HIGH 8.8EPSS 42.3%
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
- Affected
- Mozilla · Firefox · Firefox ESR · Thunderbird
- CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v2.0 NVD
- 9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C - EPSS
- 42.33% chance of exploitation in the next 30 days, 99th percentile
- Published
- 2020-12-09
- Updated
- 2024-08-04
Proof-of-concept exploits (2)
- http://packetstormsecurity.com/files/166175/Firefox-MCallGetProperty-Write-Side-Effects-U…
- https://bugzilla.mozilla.org/show_bug.cgi?id=1675905