CVE-2024-4752 in EventON Plugin
Summary
by MITRE • 07/13/2024
The EventON WordPress plugin before 2.2.15 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
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Analysis
by VulDB Data Team • 03/18/2025
The vulnerability identified as CVE-2024-4752 affects the EventON WordPress plugin version 2.2.14 and earlier, representing a critical security flaw that undermines the integrity of WordPress multisite environments. This issue stems from insufficient sanitization and escaping of user-controllable settings within the plugin's administrative interface, creating a pathway for privilege escalation through stored cross-site scripting attacks. The vulnerability specifically targets high-privilege users such as administrators who possess the capability to modify plugin settings, making it particularly dangerous in environments where security is paramount.
The technical flaw manifests in the plugin's failure to properly validate and sanitize input data before storing it in the WordPress database. When administrators configure plugin settings through the administrative dashboard, the data undergoes inadequate filtering processes that allow malicious scripts to be persisted within the system. This stored data is subsequently rendered in the browser without proper output escaping, enabling attackers to execute arbitrary JavaScript code in the context of other users' sessions. The vulnerability is particularly concerning because it can be exploited even when the unfiltered_html capability is restricted, which is a standard security practice in multisite configurations where user privileges are carefully controlled.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, data exfiltration, and privilege escalation within the WordPress environment. In multisite setups where multiple administrators may have varying levels of access, this vulnerability could allow a compromised administrator to escalate privileges further or manipulate data across multiple sites within the network. The stored nature of the XSS payload means that the attack vector remains persistent, potentially affecting numerous users over extended periods without requiring repeated exploitation attempts.
Organizations should immediately upgrade to EventON plugin version 2.2.15 or later to address this vulnerability, as the patch implements proper sanitization and escaping mechanisms for all user-controllable settings. Security administrators should also conduct thorough audits of existing plugin configurations to identify any potentially compromised data and implement additional monitoring for suspicious administrative activities. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a variant of the ATT&CK technique T1059.007 for command and scripting interpreter, where attackers leverage stored XSS to establish persistent access through malicious script execution in user browsers.