CVE-2025-14388
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.47% probability · 40th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-158
- Source
- security@wordfence.com
References
- 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/browser/phastpress/tags/3.6/sdk/phast.php#L9608
- https://plugins.trac.wordpress.org/browser/phastpress/tags/3.6/sdk/phast.php#L9641
- https://plugins.trac.wordpress.org/changeset/3418139
- https://www.wordfence.com/threat-intel/vulnerabilities/id/eec9bbc0-5a68-4624-a672-bd6227d6fa45?source=cve
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.