Greenshot is an open source Windows screenshot utility. Versions 1.3.310 and below arvulnerable to OS Command Injection through unsanitized filename processing. The FormatArguments method in ExternalCommandDestination.cs:269 uses string.Format() to insert user-controlled filenames directly into shell commands without sanitization, allowing attackers to execute arbitrary commands by crafting malicious filenames containing shell metacharacters. This issue is fixed in version 1.3.311.
Exploitability
AV:LAC:HPR:NUI:RScope
S:CImpact
C:HI:HA:H7.7/CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:HInjection