CVE-2026-16970 in iris-web
Summary
by MITRE • 07/30/2026
The IRIS web application in version 2.4.26 and possibly others contains a logout functionality which is ineffective. Stolen session cookies can therefore be misused for a long time.
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Analysis
by VulDB Data Team • 07/30/2026
The vulnerability described represents a critical session management flaw within the IRIS web application ecosystem, specifically affecting version 2.4.26 and potentially other releases in the same lineage. This issue fundamentally undermines the application's ability to properly terminate user sessions upon logout requests, creating a persistent security weakness that directly conflicts with established web application security best practices. The vulnerability manifests as an ineffective logout mechanism that fails to invalidate session tokens or clear session state information, thereby allowing unauthorized parties to continue exploiting valid session identifiers indefinitely. From a technical perspective, this flaw typically stems from inadequate session invalidation procedures where the application only removes client-side session identifiers without properly terminating server-side session objects or clearing associated authentication contexts. The operational impact of this vulnerability extends beyond simple privilege escalation scenarios, as it enables attackers to maintain prolonged access to systems and data that should be restricted to legitimate users. This persistent access capability significantly increases the potential for data exfiltration, unauthorized transactions, and other malicious activities that can occur over extended periods without detection. The vulnerability directly maps to CWE-613, which addresses insufficient session expiration, and aligns with ATT&CK technique T1563.002 related to account access removal and permission modification. Organizations utilizing this application face heightened risk of insider threats, credential theft exploitation, and extended dwell times for adversaries who have acquired valid session cookies through various means including network sniffing, cross-site scripting attacks, or other session hijacking techniques. The persistence of stolen session tokens creates an environment where attackers can operate undetected for hours or days, making traditional security monitoring approaches less effective in identifying unauthorized access patterns.
The vulnerability's exploitation potential increases substantially when considering that many organizations implement session management policies that assume proper logout functionality exists. This assumption leads to inadequate monitoring configurations and security controls that rely on session termination as a primary security boundary. The long-term usability of stolen session cookies undermines the fundamental security model of web applications, where session termination serves as a critical control point for access revocation. Security frameworks such as NIST SP 800-63B and OWASP Top Ten emphasize proper session management controls including secure session termination as essential components of application security architecture. The ineffective logout functionality creates a false sense of security that can mask other vulnerabilities or attack vectors, while simultaneously providing attackers with extended windows of opportunity to conduct reconnaissance, privilege escalation, and data manipulation activities. When combined with other exploitation techniques such as session fixation attacks or cookie injection methods, this vulnerability becomes even more dangerous as it provides persistent access even after initial compromise attempts have been detected and mitigated.
Organizations implementing mitigation strategies must address both the immediate technical flaw and establish comprehensive monitoring protocols to detect anomalous session behavior patterns. The recommended remediation approach involves implementing proper session invalidation mechanisms that ensure server-side session objects are completely terminated upon logout requests, including clearing associated authentication tokens, revoking access permissions, and removing any cached session data. Security controls should also incorporate session timeout mechanisms, automatic session termination after periods of inactivity, and robust logging of all session management events to enable rapid detection of unauthorized access attempts. Organizations should implement additional layers of security such as multi-factor authentication, session binding to IP addresses or user agents, and regular session validation checks to minimize the impact of this vulnerability even if it remains unpatched temporarily. The implementation of these mitigations aligns with the principle of defense in depth and addresses both the immediate technical weakness and broader session management security gaps that may exist within the application architecture. Regular security assessments and penetration testing should specifically target session management controls to ensure that logout functionality operates as intended and that session tokens cannot be reused after legitimate termination events have occurred.