ImageMagick before 7.1.2-26 contains a policy bypass vulnerability in the APNG encoder and external delegates due to missing validation checks. Attackers can write files to disallowed paths by bypassing configured policy restrictions through the APNG encoding process.
Exploitability
AV:LAC:LAT:NPR:LUI:NVulnerable System
VC:NVI:LVA:NSubsequent System
SC:NSI:NSA:N4.8/CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:NFile System