CVE-2026-56026 in utm.codes Plugin
Summary
by MITRE • 06/26/2026
Subscriber Server Side Request Forgery (SSRF) in utm.codes <= 1.9.0 versions.
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Analysis
by VulDB Data Team • 06/26/2026
The vulnerability identified as subscriber server side request forgery in utm.codes affects versions 1.9.0 and earlier, representing a critical security flaw that allows attackers to manipulate the application's internal network requests. This issue arises from insufficient input validation within the application's handling of user-supplied data that is subsequently used to construct HTTP requests to internal services. The vulnerability falls under the Common Weakness Enumeration category CWE-918 which specifically addresses server-side request forgery attacks where malicious actors can cause the server to make unintended requests to internal systems.
The technical implementation of this flaw involves the application's failure to properly sanitize or validate URLs provided by users in the context of tracking or monitoring functionalities. When utm.codes processes user input containing potentially malicious URLs, it does not adequately verify the destination of these requests before executing them on the server side. This creates an opportunity for attackers to probe internal network services, access restricted resources, or perform unauthorized data exfiltration by crafting specially crafted requests that bypass normal access controls. The vulnerability enables attackers to target internal systems that would normally be protected from external access, potentially exposing sensitive infrastructure components.
The operational impact of this vulnerability extends beyond simple data exposure, as it can facilitate more sophisticated attack chains within compromised environments. An attacker could leverage this flaw to perform reconnaissance of internal network services, potentially identifying vulnerable internal systems or services that are not directly exposed to the internet. The vulnerability also presents risks for privilege escalation attacks if internal services are configured with elevated permissions or access to sensitive data repositories. Additionally, the exploitation could enable attackers to use the compromised server as a pivot point for further attacks within the network infrastructure, making it a significant concern for organizations relying on this application for tracking purposes.
Mitigation strategies for this vulnerability require immediate patching of affected utm.codes installations to versions greater than 1.9.0 where the SSRF protections have been implemented. Organizations should also implement network-level restrictions that limit outbound connections from the utm.codes server to only necessary external services, reducing the attack surface available to potential exploitation. Input validation mechanisms must be strengthened to ensure all user-supplied URLs are properly sanitized and validated against a whitelist of approved domains or patterns. Network segmentation and firewall rules should be configured to prevent internal service discovery through this vulnerability, while also implementing proper logging and monitoring to detect suspicious outbound requests that may indicate exploitation attempts. The ATT&CK framework categorizes this type of vulnerability under T1190 - Proxying, where adversaries use compromised systems to route traffic through them for evasion purposes, making proper network controls essential for defense in depth strategies.