CVE-2026-22384 in Applay Plugin
Summary
by MITRE • 02/20/2026
Deserialization of Untrusted Data vulnerability in leafcolor Applay - Shortcodes applay-shortcodes allows Object Injection.This issue affects Applay - Shortcodes: from n/a through <= 3.7.
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Analysis
by VulDB Data Team • 02/20/2026
The vulnerability identified as CVE-2026-22384 represents a critical deserialization flaw within the leafcolor Applay - Shortcodes plugin, specifically affecting versions ranging from the initial release through version 3.7. This issue falls under the category of insecure deserialization, a well-documented weakness that has been classified under CWE-502 by the Common Weakness Enumeration catalog. The vulnerability manifests through the plugin's handling of user-supplied data within the applay-shortcodes component, where untrusted input is being deserialized without proper validation or sanitization mechanisms. The object injection aspect of this vulnerability indicates that malicious actors can potentially inject arbitrary objects into the application's memory space, which can lead to severe security consequences including remote code execution, privilege escalation, or complete system compromise.
The technical exploitation of this vulnerability occurs when the plugin processes shortcode parameters or user input that contains serialized data structures. When the application deserializes this untrusted data without adequate security controls, it creates an attack surface where malicious payloads can be executed within the context of the web application. This type of vulnerability is particularly dangerous because it can be leveraged to bypass traditional security measures such as input validation and access controls. The attack vector typically involves an attacker crafting malicious serialized data that, when processed by the vulnerable plugin, triggers the execution of unintended code. This flaw aligns with the ATT&CK framework's technique T1203, which describes exploitation of software vulnerabilities for privilege escalation and code execution.
The operational impact of CVE-2026-22384 extends beyond simple data corruption or service disruption, as it can enable full system compromise when exploited successfully. Organizations running affected versions of the Applay - Shortcodes plugin face significant risk of unauthorized access, data breaches, and potential lateral movement within their network infrastructure. The vulnerability's presence in a widely used plugin increases the attack surface for organizations, as many WordPress installations rely on shortcode functionality for dynamic content generation. Attackers can exploit this weakness through various means including crafting malicious posts, pages, or shortcode parameters that contain their payload. The vulnerability's persistence across multiple versions suggests that proper input validation mechanisms were not adequately implemented or maintained throughout the plugin's development lifecycle, making it a particularly concerning issue for system administrators and security teams responsible for protecting WordPress environments.
Mitigation strategies for this vulnerability should prioritize immediate remediation through version updates to the latest stable release of the Applay - Shortcodes plugin, as vendors typically address such issues through patches or security updates. Organizations should implement comprehensive input validation and sanitization measures to prevent untrusted data from being processed by the deserialization components. Network-based mitigations such as web application firewalls can provide additional protection layers, though they should not be considered a complete solution. Security teams should also conduct thorough vulnerability assessments to identify any potential exploitation attempts and monitor system logs for suspicious activity related to shortcode processing. The implementation of principle of least privilege and regular security audits can help minimize the potential impact should exploitation occur, while also providing better visibility into the overall security posture of WordPress installations.