CVE-2026-28178 in Powerkit Plugin
Summary
by MITRE • 08/06/2026
Contributor Cross Site Scripting (XSS) in Powerkit <= 3.1.0 versions.
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Analysis
by VulDB Data Team • 08/06/2026
The vulnerability identified as contributor cross site scripting in Powerkit versions up to and including 3.1.0 represents a critical security flaw that allows unauthorized users to inject malicious scripts into web applications. This type of vulnerability specifically targets the contributor role within WordPress environments, where users with limited administrative privileges can potentially exploit the system to execute arbitrary code on behalf of other users. The issue stems from insufficient input validation and output sanitization mechanisms within the Powerkit plugin's codebase, creating an avenue for attackers to manipulate data flows and compromise user sessions.
The technical implementation of this cross site scripting vulnerability occurs when contributor-level users submit content or interact with specific plugin features that fail to properly sanitize user input before rendering it in web pages. This weakness enables attackers to inject malicious javascript payloads through form fields, comment sections, or other interactive elements within the plugin interface. The flaw operates under CWE-79 which classifies cross site scripting as a common vulnerability where untrusted data is embedded into web pages without proper validation or encoding. Attackers can leverage this vulnerability to steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users within the WordPress environment.
From an operational impact perspective, this vulnerability significantly undermines the security posture of WordPress installations using Powerkit plugin versions 3.1.0 and earlier. Contributors who gain access to this vulnerability can potentially escalate their privileges, access sensitive data, or compromise other users' accounts within the same system. The attack vector is particularly concerning because it targets roles that typically have limited permissions but still maintain access to various content management features. This vulnerability aligns with ATT&CK technique T1059.007 which covers script injection attacks and can lead to persistent access through session hijacking or credential theft. The impact extends beyond individual user compromise to potential system-wide infiltration when multiple contributors exist within the environment.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected Powerkit versions to the latest releases that contain proper input sanitization and output encoding mechanisms. System administrators should implement comprehensive monitoring of contributor activities and review plugin permissions regularly to prevent unauthorized access to sensitive features. Additional protective measures include implementing content security policies that restrict script execution, enabling strict output encoding for all user-generated content, and conducting regular security audits of installed plugins. Organizations should also consider implementing web application firewalls and intrusion detection systems that can identify and block suspicious script injection attempts. The remediation process must include thorough testing of patched versions to ensure that the vulnerability has been properly addressed without introducing regressions in functionality. Regular security updates and vulnerability assessments remain essential for maintaining protection against similar threats in other plugins within the WordPress ecosystem.