CVE-2025-58011 is a Server-Side Request Forgery (SSRF) vulnerability identified in the Alex Content Mask product, affecting versions up to 1.8.5.2. SSRF vulnerabilities occur when an attacker can abuse a server functionality to make HTTP requests to arbitrary domains or internal systems, potentially bypassing network access controls. In this case, the vulnerability allows an attacker with at least low-level privileges (PR:L) to induce the server hosting Content Mask to send crafted requests to internal or external resources without user interaction (UI:N). The CVSS v3.1 base score of 6.4 reflects a medium severity, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), and partial impact on confidentiality and integrity (C:L/I:L), but no impact on availability (A:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. Although no known exploits are currently in the wild, the SSRF flaw could be leveraged to access sensitive internal services, perform reconnaissance, or pivot attacks within a network. The absence of available patches at the time of publication increases the urgency for mitigation. The vulnerability is cataloged under CWE-918, which covers SSRF issues that can lead to unauthorized internal resource access or data leakage.

For European organizations using Alex Content Mask, this SSRF vulnerability poses a risk of unauthorized internal network access and potential data exposure. Attackers exploiting this flaw could reach internal services that are otherwise inaccessible from the internet, such as databases, metadata services, or administrative interfaces, leading to confidentiality breaches or integrity violations. Given the medium severity and the requirement for at least some privileges, the threat is more pronounced in environments where multiple users have access to the Content Mask platform. Organizations in sectors with sensitive data—such as finance, healthcare, and government—could face increased risks of data leakage or lateral movement by attackers. Additionally, the changed scope indicates that the impact could extend beyond the vulnerable component, potentially affecting other connected systems. The lack of known exploits currently reduces immediate risk, but the vulnerability's nature means it could be weaponized in targeted attacks, especially in environments with weak internal network segmentation or insufficient monitoring.

European organizations should implement the following specific mitigations: 1) Restrict and monitor user privileges within Alex Content Mask to limit the ability of low-privilege users to trigger SSRF requests. 2) Employ strict network segmentation and firewall rules to limit the server's ability to make outbound requests to sensitive internal resources. 3) Implement input validation and output encoding where possible to sanitize URLs or parameters that could be used in SSRF attacks. 4) Monitor logs for unusual outbound requests originating from the Content Mask server, focusing on internal IP ranges and uncommon destinations. 5) Engage with the vendor Alex to obtain patches or updates as soon as they become available and plan for prompt deployment. 6) Consider deploying Web Application Firewalls (WAFs) with SSRF detection capabilities to block suspicious request patterns. 7) Conduct internal penetration testing and vulnerability scanning focused on SSRF vectors to identify and remediate similar issues proactively.