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. 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

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-25)

CWE

CWE-158

Published

2025-12-23

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

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

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