Upgrade WordPress core to version 7.0.3 and implement various security
hardening measures, including improved input sanitization, enhanced
URL validation for HTTP requests, and stricter CSS filtering.
- Update version to 7.0.3 in version.php and about.php
- Implement stricter IP address validation in wp_http_validate_url()
- Add escaping to user-related error messages and authentication flows
- Improve sanitization in block rendering (post-content, post-date)
- Enhance CSS filtering in kses.php to handle PCRE errors
- Add validation for tagName attributes in post-content block
- Update emoji loader to use more secure DOM selection patterns
- Enable WP_DEBUG and error logging in wp-config.php
- Add new ifnex theme directory
