جزئیات آسیب‌پذیری

The PhastPress plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Read via null byte injection in all versions up to, and including, 3.7. This is due to a discrepancy between the extension validation in `getExtensionForURL()` which operates on URL-decoded paths, and `appendNormalized()` which strips everything after a null byte before constructing the filesystem path. This makes it possible for unauthenticated attackers to read arbitrary files from the webroot, including wp-config.php, by appending a double URL-encoded null byte (%2500) followed by an allowed extension (.txt) to the file path.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/eec9bbc0-5a68-4624-a672-bd6227d6fa45?source=cve
• https://plugins.trac.wordpress.org/browser/phastpress/tags/3.6/sdk/phast.php#L9641
• https://plugins.trac.wordpress.org/browser/phastpress/tags/3.6/sdk/phast.php#L9608
• https://plugins.trac.wordpress.org/browser/phastpress/tags/3.6/sdk/phast.php#L9570
• https://plugins.trac.wordpress.org/browser/phastpress/tags/3.6/sdk/phast.php#L9597
• https://plugins.trac.wordpress.org/changeset/3418139