Notepad++ “Run by system” executes *.txt.cmd when user selected *.txt (target confusion → command execution)
18Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8
exploitation probability
—
observed exploitation
nono source reports it
Notepad++ is a free and open-source source code editor. Prior to 8.9.8, the Folder as Workspace Run by system action in Notepad++ can resolve a different sibling file than the file selected by the user. When an attacker places a command script whose name is the selected text-file path with .cmd appended, and the user invokes Run by system on the text file on Windows 10 or Windows 11, Notepad++ can execute the sibling script as the current user instead of opening the selected file. This issue is fixed in version 8.9.8.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
notepad-plus-plus · notepad-plus-plusReferences
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/00fa5df0da1d4f6b334317aa979db13ac77ee24dhttps://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-w5xq-frjg-w4cwhttps://notepad-plus-plus.org/news/v898-released