### Impact
The default implementation of `Validator.getValidDirectoryPath(String, String, File, boolean)` may incorrectly treat the tested input string as a child of the specified parent directory. This potentially could allow control-flow bypass checks to be defeated if an attack can specify the entire string representing the ‘input’ path.

### Patches
This vulnerability is patched in release 2.3.0.0 of ESAPI. See https://github.com/ESAPI/esapi-java-legacy/releases/tag/esapi-2.3.0.0 for details.

### Workarounds
Yes; in theory, one _could_ write the own implementation of the Validator interface. This would most easily be done by sub-classing a version of the affected `DefaultValidator` class and then overriding the affected `getValidDirectoryPath()` to correct the issue. However, this is not recommended.

### For more information
If you have any questions or comments about this advisory:
* Email one of the project co-leaders. See email addresses listed on the [OWASP ESAPI wiki](https://owasp.org/www-project-enterprise-security-api/) page, under “Leaders”.
* Send email to one of the two ESAPI related Google Groups listed under [Where to Find More Information on ESAPI](https://github.com/ESAPI/esapi-java-legacy#where-to-find-more-information-on-esapi) on our [README.md](https://github.com/ESAPI/esapi-java-legacy#readme) page.