CVE-2026-57713 in Events Manager Plugin
Summary
by MITRE • 07/13/2026
Deserialization of Untrusted Data vulnerability in Marcus (aka @msykes) Events Manager events-manager allows Object Injection.This issue affects Events Manager: from n/a through <= 7.3.6.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 07/13/2026
The deserialization of untrusted data vulnerability in Events Manager represents a critical security flaw that enables object injection attacks through the marcus events manager plugin. This vulnerability specifically impacts versions ranging from the initial release through version 7.3.6, creating a persistent risk window where attackers can exploit the system's failure to properly validate serialized data inputs. The issue stems from the plugin's inadequate sanitization of user-provided data during the deserialization process, allowing malicious actors to inject crafted objects that can be executed within the application context.
The technical flaw manifests when Events Manager processes serialized data structures containing malicious payloads without proper input validation or sanitization measures. This creates an attack surface where untrusted data from external sources can be interpreted and executed as legitimate objects, bypassing normal security controls. The vulnerability aligns with CWE-502, which specifically addresses deserialization of untrusted data, making it susceptible to various exploitation techniques including remote code execution, privilege escalation, or data manipulation attacks. Attackers can leverage this weakness by crafting specially formatted serialized objects that, when processed by the vulnerable plugin, trigger unintended behavior within the WordPress environment.
The operational impact of this vulnerability extends beyond simple data corruption or unauthorized access, as it can potentially enable complete system compromise when exploited successfully. An attacker who gains control through this deserialization flaw could execute arbitrary code on the server, escalate privileges to administrative levels, or manipulate event data in ways that affect business operations and user trust. The vulnerability affects the core functionality of events management within WordPress environments, making it particularly dangerous for organizations relying on calendar-based applications for scheduling, resource allocation, or community engagement activities.
Security mitigations for this vulnerability require immediate patching of the Events Manager plugin to version 7.3.7 or later, which contains the necessary fixes for proper data validation and sanitization. Organizations should also implement network-level controls including firewall rules that restrict access to plugin endpoints, employ input validation at multiple layers, and conduct regular security assessments of third-party plugins. Additionally, implementing content delivery networks with security features, maintaining updated security monitoring tools, and establishing secure coding practices for custom plugin development can help prevent similar vulnerabilities from emerging in future implementations. The remediation process should include thorough testing of the patched environment to ensure compatibility while eliminating the attack vectors exposed by this deserialization vulnerability.