CVE-2026-28161 in Service Finder Booking Plugin
Summary
by MITRE • 08/13/2026
Subscriber Privilege Escalation in Service Finder Booking <= 6.2 versions.
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Analysis
by VulDB Data Team • 08/13/2026
The vulnerability identified as subscriber privilege escalation in Service Finder Booking plugin affects versions up to and including 6.2, representing a critical security flaw that allows unauthorized users to gain elevated privileges within the system. This type of vulnerability falls under the category of access control weaknesses and is particularly dangerous because it enables attackers to bypass normal authentication mechanisms and assume the identity of higher-privileged users. The issue stems from improper validation of user roles and permissions during service booking operations, creating a pathway for malicious actors to exploit the system's trust model.
The technical implementation of this vulnerability occurs due to insufficient input sanitization and role verification within the plugin's core functions that handle booking processes. Attackers can manipulate specific parameters or request sequences to escalate their privileges from subscriber level to administrator level without proper authentication. This typically involves exploiting missing authorization checks in API endpoints or form processing logic where the system fails to verify whether the requesting user possesses sufficient permissions to perform certain operations. The flaw demonstrates characteristics consistent with CWE-285: Improper Authorization, which specifically addresses situations where systems fail to properly enforce access controls.
The operational impact of this vulnerability is severe and far-reaching, as it allows attackers to gain complete administrative control over the affected WordPress site. Once escalated, malicious actors can modify or delete all booking data, alter system configurations, install malware, access sensitive customer information, and potentially use the compromised system as a launchpad for further attacks within the network. The vulnerability affects not only the booking functionality but also compromises the overall integrity of the WordPress installation, as administrators may be unaware that unauthorized users have gained elevated privileges. This creates a persistent threat vector that can remain undetected for extended periods.
Mitigation strategies should include immediate patching to versions greater than 6.2 where the privilege escalation issue has been resolved. System administrators must also implement additional security measures such as monitoring for unusual access patterns, enforcing multi-factor authentication for all user accounts, and conducting regular security audits of installed plugins. Organizations should consider implementing network segmentation and access control policies to limit the potential damage from successful exploitation. The vulnerability aligns with ATT&CK technique T1078: Valid Accounts, as it exploits legitimate user accounts to gain unauthorized access to elevated privileges. Additionally, this issue reflects the broader category of privilege escalation vulnerabilities that are frequently targeted in automated attack campaigns and require immediate remediation to prevent data breaches and system compromise.