CVE-2026-3043 in Event Management System
Summary
by MITRE • 02/24/2026
A flaw has been found in itsourcecode Event Management System 1.0. The impacted element is an unknown function of the file /admin/navbar.php. Executing a manipulation of the argument page can lead to cross site scripting. The attack may be performed from remote. The exploit has been published and may be used.
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Analysis
by VulDB Data Team • 05/27/2026
The vulnerability identified in the Event Management System 1.0 represents a critical cross site scripting flaw that resides within the administrative navigation component of the application. This weakness specifically manifests in an unknown function located within the /admin/navbar.php file, indicating a potential lack of proper input validation and sanitization mechanisms. The vulnerability's exploitation pathway involves manipulation of the page argument parameter, which suggests that user-supplied input is directly incorporated into the page's output without adequate security measures. Such a flaw creates an avenue for attackers to inject malicious scripts that can execute within the context of other users' browsers, potentially compromising their sessions and accessing sensitive information.
The technical nature of this vulnerability aligns with CWE-79, which defines cross site scripting as a code injection attack that occurs when an application includes untrusted data in a new web page without proper validation or escaping. The attack vector being remotely executable indicates that this vulnerability does not require physical access or local network privileges to exploit, making it particularly dangerous in production environments. The fact that an exploit has been published and is readily available for use significantly elevates the risk level, as it removes the barrier to entry for potential attackers who may not possess advanced technical skills. This exposure means that any system running this vulnerable version of the Event Management System is immediately at risk of being compromised by threat actors who can simply deploy the existing exploit code.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal authentication tokens, deface web pages, or redirect users to malicious websites. In the context of an event management system, this could result in unauthorized access to administrative functions, modification of event listings, or theft of sensitive user data. The vulnerability's presence in the administrative navigation component means that successful exploitation could potentially provide attackers with elevated privileges within the application's administrative interface. This scenario creates a pathway for more extensive compromise, as attackers could manipulate the system to gain persistence, escalate privileges, or access other system components that may contain additional vulnerabilities.
Mitigation strategies should prioritize immediate patching of the Event Management System to address the specific flaw in the navbar.php file. Organizations should implement proper input validation and output encoding mechanisms to prevent malicious data from being executed as scripts. The implementation of a web application firewall can provide additional protection by filtering suspicious requests and monitoring for known exploit patterns. Security monitoring should be enhanced to detect unusual access patterns or attempts to manipulate the page parameter. The use of content security policies can further limit the execution of unauthorized scripts within the application's context. Additionally, regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other components of the system. According to ATT&CK framework, this vulnerability maps to T1059.007 for scripting and T1566 for malicious file execution, indicating the need for comprehensive defensive measures across multiple attack vectors. Organizations should also consider implementing principle of least privilege access controls to limit the potential damage from successful exploitation attempts.