fix security issues in samples (#183)

## Change description

> Fix vulnerabilities for samples

## Type of change
- [ ] Bug fix (fixes an issue)
- [ ] New feature (adds functionality)
- [x] Security fixes

## Related issues
 Security fixes in samples/

## Checklists

### Development

- [X] Lint rules pass locally
- [ ] Application changes have been tested thoroughly
- [ ] Automated tests covering modified code pass

### Security

- [ ] Security impact of change has been considered
- [ ] Code follows company security practices and guidelines

### Code review 

- [x] Pull request has a descriptive title and context useful to a
reviewer. Screenshots or screencasts are attached as necessary
- [x] reviewers assigned

Signed-off-by: Sofia Chakir <sofiachakir@gmail.com>

Author: sofiachakir