CVE-2025-33015 in Concert
Summary
by MITRE • 01/20/2026
IBM Concert 1.0.0 through 2.1.0 is vulnerable to malicious file upload by not validating the content of the file uploaded to the web interface.
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Analysis
by VulDB Data Team • 01/22/2026
IBM Concert versions 1.0.0 through 2.1.0 contain a critical vulnerability that allows unauthorized file uploads through the web interface without proper content validation. This flaw represents a classic insecure file upload vulnerability that enables attackers to bypass security controls and potentially execute malicious code within the application environment. The vulnerability stems from insufficient input validation mechanisms that fail to properly inspect or sanitize file content before processing, creating an avenue for arbitrary code execution and system compromise.
The technical implementation of this vulnerability occurs when the web interface accepts file uploads without performing adequate content type verification or file format validation. Attackers can exploit this weakness by uploading malicious files that may contain executable code, scripts, or other harmful content that the application processes without proper security checks. This type of vulnerability falls under CWE-434 which specifically addresses insecure file upload scenarios where applications fail to validate file contents before storing or processing them. The vulnerability creates a direct path for attackers to bypass authentication mechanisms and gain unauthorized access to system resources through the compromised upload functionality.
The operational impact of this vulnerability extends beyond simple unauthorized access to include potential full system compromise and data breach scenarios. An attacker who successfully exploits this vulnerability could execute arbitrary code on the server, potentially gaining administrative privileges and access to sensitive data stored within the IBM Concert environment. The attack surface is particularly concerning given that the vulnerability affects multiple versions of the platform, increasing the potential attack surface and making it more likely for organizations to be affected. This vulnerability aligns with ATT&CK technique T1190 which describes the use of compromised applications to establish persistence and execute malicious code within target environments.
Organizations utilizing IBM Concert within the affected version ranges should immediately implement multiple layers of mitigation strategies to address this vulnerability. The primary recommendation involves implementing strict file validation mechanisms that verify file content type, size, and format before processing uploads. Additionally, deploying web application firewalls and implementing proper access controls can help reduce the risk of exploitation. Regular security assessments and monitoring of upload directories for suspicious activity should be implemented as part of the overall security posture. The vulnerability also highlights the importance of keeping software components up to date and following secure coding practices that include proper input validation and content sanitization. Organizations should conduct immediate vulnerability scans to identify affected systems and ensure that all instances of IBM Concert are updated to versions that address this specific security flaw.