Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Prior to 1.24.0, multiple Git-related API endpoints use execAsync() with string interpolation of user-controlled parameters (file, branch, message, commit), allowing authenticated attackers to execute arbitrary OS commands. This vulnerability is fixed in 1.24.0.

Affected: npm: @siteboon/claudecodeui

### Summary Multiple Git-related API endpoints use execAsync() with string interpolation of user-controlled parameters (file, branch, message, commit), allowing authenticated attackers to execute arbitrary OS commands.

### Details The claudecodeui application provides Git integration through various API endpoints. These endpoints accept user-controlled parameters such as file paths, branch names, commit messages, and commit hashes, which are directly interpolated into shell command strings passed to execAsync().

The application attempts to escape double quotes in some parameters, but this protection is trivially bypassable using other shell metacharacters such as:

Command substitution: $(command) or \`command\` Command chaining: ;, &&, || Newlines and other control characters

### Affected Endpoints `GET /api/git/diff - file parameter` `GET /api/git/status - file parameter` `POST /api/git/commit - files array and message parameter` `POST /api/git/checkout - branch parameter` `POST /api/git/create-branch - branch parameter` `GET /api/git/commits - commit hash parameter` `GET /api/git/commit-diff - commit parameter`

### Vulnerable Code

File: server/routes/git.js ``` // Line 205 - git status with file parameter const { stdout: statusOutput } = await execAsync( `git status --porcelain "${file}"`, // INJECTION via file { cwd: projectPath } ); ``` ``` // Lines 375-379 - git commit with files array and message for (const file of files) { await execAsync(`git add "${file…