The solution argument in CleanSlateAsync and SolutionRestoreAsync is interpolated into a command string with only double-quote escaping. On Windows, when the command is routed through cmd.exe /c (lines 130-136), an attacker can escape the quotes using characters like " & malicious_command &. For example, a solution argument of test" & calc & echo " would execute arbitrary commands. While this is a dev helper script and the risk is limited to developers running it manually, it violates secure coding practices for command execution.

On Windows, user-provided solution argument is interpolated into a string that gets passed to cmd.exe /c. While the solution path is quoted, shell metacharacters like "& could break out of quotes and execute arbitrary commands. For example, a solution argument of foo" & malicious & " would result in command execution. Since this is a local dev script where the user controls both execution and input, the practical risk is minimal, but the pattern is worth noting.