CVE-2023-52137

The `tj-actions/verify-changed-files` action allows for command injection in changed filenames, allowing an attacker to execute arbitrary code and potentially leak secrets. The `verify-changed-files` workflow returns the list of files changed within a workflow execution. This could potentially allow filenames that contain special characters such as `;` which can be used by an attacker to take over the GitHub Runner if the output value is used in a raw fashion (thus being directly replaced before execution) inside a `run` block. By running custom commands, an attacker may be able to steal secrets such as `GITHUB_TOKEN` if triggered on other events than `pull_request`. This has been patched in versions 17 and 17.0.0 by enabling `safe_output` by default and returning filename paths escaping special characters for bash environments.