CVE-2018-5950 in Mailman
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the web UI in Mailman before 2.1.26 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 02/02/2023
The vulnerability identified as CVE-2018-5950 represents a cross-site scripting flaw within the web user interface of Mailman versions prior to 2.1.26. This issue falls under the category of CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly sanitize user-supplied data before incorporating it into web page content. The vulnerability exists in the web-based administrative and user interfaces of the Mailman mailing list management system, making it accessible to remote attackers who can exploit it without requiring authentication or privileged access.
The technical nature of this XSS vulnerability stems from insufficient input validation and output encoding mechanisms within Mailman's web interface components. Attackers can leverage this weakness by injecting malicious scripts or HTML content through unspecified vectors within the application's user interface. These vectors likely encompass form fields, URL parameters, or any input mechanisms that process user data for display in web pages. The vulnerability's impact is amplified by the fact that Mailman serves as a critical component in email list management for numerous organizations, making it an attractive target for adversaries seeking to compromise web applications and potentially escalate their attacks.
The operational implications of this vulnerability are significant for organizations relying on Mailman for their mailing list services. Remote attackers can execute malicious scripts in the context of other users' browsers, potentially leading to session hijacking, credential theft, or unauthorized actions within the Mailman interface. This could result in unauthorized access to mailing list configurations, user management capabilities, or even the ability to send spam messages through compromised lists. The vulnerability's exposure across the web interface means that any user with access to the Mailman web UI could potentially be targeted, creating a broad attack surface that extends beyond simple script execution to encompass complete session compromise and privilege escalation possibilities.
Organizations should prioritize immediate remediation by upgrading to Mailman version 2.1.26 or later, which contains the necessary patches to address the XSS vulnerability. Additionally, implementing proper input validation and output encoding mechanisms within the web application can serve as defensive measures. Security professionals should also consider deploying web application firewalls and monitoring for suspicious input patterns that might indicate exploitation attempts. This vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers may use the XSS vulnerability to deliver malicious payloads through compromised mailing list interfaces. Regular security assessments and input sanitization reviews should be conducted to prevent similar issues in other web applications, particularly those handling user-generated content in web interfaces.