CVE-2026-58148 in ChronoForms Plugin
Summary
by MITRE • 07/17/2026
The Joomla extension ChronoForms is vulnerable to an unauthenticated stored XSS vulnerability.
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Analysis
by VulDB Data Team • 07/17/2026
The vulnerability in the Joomla extension ChronoForms represents a critical security flaw that allows attackers to execute malicious scripts in the context of any user who views affected content without requiring authentication. This type of vulnerability falls under the category of stored cross-site scripting as defined by CWE-79, which occurs when malicious code is permanently stored on the target server and then served to other users. The attack vector specifically targets the ChronoForms extension's handling of user input within its web interface, where data submitted through forms is not properly sanitized before being rendered back to end users.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the ChronoForms component. When administrators or users interact with form elements, the extension fails to adequately filter or escape special characters that could be interpreted as HTML or JavaScript code. This allows an attacker to inject malicious payloads through form fields, configuration settings, or any input parameter that gets stored in the database and subsequently displayed without proper sanitization. The vulnerability is particularly dangerous because it requires no authentication from the attacker, making it accessible to anyone with knowledge of the target system's structure.
The operational impact of this stored XSS vulnerability extends beyond simple data theft or defacement, as it can enable more sophisticated attacks such as session hijacking, credential theft, and privilege escalation. An attacker could craft malicious payloads that redirect users to phishing sites, steal cookies containing session tokens, or even execute commands on the victim's browser to manipulate the application interface. The persistent nature of stored XSS means that once a malicious script is injected, it will affect all users who view the affected content until the injection is removed from the database. This creates a long-term security risk that can compound over time as more users interact with the compromised system.
Mitigation strategies for this vulnerability should include immediate implementation of proper input sanitization and output encoding techniques throughout the ChronoForms extension. Security patches should be applied to ensure all user-supplied data is properly escaped before being stored or rendered back to users, adhering to established security practices such as those recommended by the OWASP Top Ten project. Organizations should also implement content security policies to limit script execution within the application context and regularly audit form inputs for potential malicious code injection attempts. Additionally, network monitoring solutions should be configured to detect unusual traffic patterns that might indicate exploitation attempts, while maintaining comprehensive logging of all administrative activities to identify potential unauthorized access or modifications.
The vulnerability demonstrates how third-party extensions in content management systems like Joomla can introduce significant security risks when proper security controls are not implemented during development. This aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, where attackers leverage client-side scripting vulnerabilities to compromise user sessions and execute malicious code. Organizations should maintain updated inventories of all installed extensions and regularly review their security posture to identify and remediate similar vulnerabilities that could affect other components within their web applications.