CVE-2025-27217 in UISP Application
Summary
by MITRE • 08/21/2025
A Server-Side Request Forgery (SSRF) in the UISP Application may allow a malicious actor with certain permissions to make requests outside of UISP Application scope.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/21/2025
The CVE-2025-27217 vulnerability represents a critical server-side request forgery flaw within the UISP application ecosystem that fundamentally compromises the application's network boundary protections. This vulnerability exists in the application's handling of user-supplied input that is subsequently used to construct HTTP requests to external systems. The flaw allows an attacker to manipulate the application's internal request mechanisms to bypass normal network restrictions and access resources that should otherwise be isolated from the application's operational scope. The vulnerability specifically affects scenarios where the application processes user-provided URLs or network addresses without adequate validation or sanitization, creating a pathway for attackers to redirect requests to internal network resources or external malicious endpoints.
The technical implementation of this SSRF vulnerability stems from insufficient input validation and improper request construction within the UISP application's network communication modules. When legitimate users with specific permissions submit requests containing external URLs or network addresses, the application fails to properly validate these inputs against a whitelist of acceptable destinations or to enforce strict network boundary controls. This weakness creates an attack surface where malicious actors can construct requests that traverse the application's intended network boundaries, potentially accessing internal systems, services, or data that should remain protected within the application's security perimeter. The vulnerability operates at the application layer where HTTP requests are processed, making it particularly dangerous as it can be exploited through various user-facing interfaces that handle network configuration or external service integration.
The operational impact of CVE-2025-27217 extends beyond simple unauthorized access to encompass potential data exfiltration, internal network reconnaissance, and escalation of privileges within the application environment. Attackers exploiting this vulnerability can leverage the application's trust relationship with internal systems to perform reconnaissance activities that would normally be blocked by firewalls or network segmentation controls. The vulnerability particularly affects organizations relying on UISP for network management and monitoring, as it could enable attackers to discover internal services, access sensitive configuration data, or even pivot to other systems within the network. The potential for lateral movement increases significantly when the application has elevated privileges or access to sensitive network resources, making this vulnerability a prime target for attackers seeking to expand their operational reach within the affected environment.
Organizations should implement immediate mitigations including comprehensive input validation, strict URL whitelisting mechanisms, and network segmentation controls to prevent unauthorized external communications. The vulnerability aligns with CWE-918, which specifically addresses server-side request forgery vulnerabilities where applications fail to properly validate user-supplied URLs or network addresses. Security teams should also consider implementing network-level controls such as firewalls or proxy configurations that can block outbound requests to internal network segments from application servers. Additionally, the application should be configured to operate in a restricted network environment where outbound connections are limited to approved external endpoints only. The ATT&CK framework categorizes this vulnerability under T1566, which covers the exploitation of vulnerabilities to perform initial access or lateral movement activities, making it a critical concern for organizations implementing defensive security measures. Regular security assessments and code reviews should focus on identifying similar input validation gaps in other application components to prevent similar vulnerabilities from emerging in the broader system architecture.