Oliver POS <= 2.4.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to 'OliverAuth' Header

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Summary

CVECVE-2026-6072
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-20 02:16:37 UTC
Updated2026-05-20 13:54:54 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.001860000 probability, percentile 0.399940000 (date 2026-05-27)

Problem Types: CWE-639 | CWE-639 CWE-639 Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Oliverpos Oliver POS A WooCommerce Point Of Sale POS affected 2.4.2.6 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge-user.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge-use... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge-use... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge-user.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/tags/2.4.2.6/includes/class-pos-bridge-use... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge-user.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/oliver-pos/trunk/includes/class-pos-bridge.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/ca6aa922-9c58-445c-b88a-3d1d1... [email protected] www.wordfence.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Hunter Jensen (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-19T12:03:04.000ZDisclosed
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