CVE-2025-8083 is a prototype pollution vulnerability identified in the Vuetify UI framework, specifically affecting versions from 2.2.0-beta.2 up to 3.0.0-alpha.10. The root cause lies in the 'mergeDeep' utility function used internally by the Preset configuration feature, which merges user-supplied options with default settings. This function does not properly sanitize or control modifications to object prototype attributes, enabling an attacker to craft malicious presets that inject or overwrite properties on JavaScript's Object prototype. Such pollution affects all objects inheriting from Object.prototype, potentially altering application logic, bypassing security controls, or causing resource exhaustion. In environments employing Server-Side Rendering (SSR), the impact escalates as the vulnerability can compromise the entire server process, leading to denial of service or unauthorized data exposure. Since Vuetify 2.x is end-of-life, no official patches are available, forcing users to either upgrade to unsupported alpha versions or implement custom mitigations. The vulnerability has a CVSS v3.1 score of 8.6 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H), indicating it is remotely exploitable without privileges or user interaction, with high impact on availability and moderate impact on confidentiality and integrity. No known exploits have been reported yet, but the ease of exploitation and severity warrant immediate attention.

For European organizations, this vulnerability poses significant risks, particularly for those relying on Vuetify 2.x in web applications with SSR. Exploitation can lead to denial of service, disrupting critical business services and causing operational downtime. Unauthorized modification of application behavior may expose sensitive data or allow privilege escalation within the application context. Organizations in sectors such as finance, healthcare, and government, which often deploy SSR for performance and SEO benefits, face heightened risks due to potential server-wide compromise. The lack of official patches for Vuetify 2.x increases exposure duration and complicates remediation efforts. Additionally, the widespread use of JavaScript frameworks in European digital services means a broad attack surface. The vulnerability could also be leveraged as a foothold for further attacks within corporate networks, amplifying its impact on confidentiality, integrity, and availability.

European organizations should prioritize upgrading to Vuetify 3.x or later versions where this vulnerability is addressed, despite the alpha status, or consider alternative UI frameworks if upgrade paths are blocked. If immediate upgrade is not feasible, implement strict input validation and sanitization on any user-supplied preset configurations to prevent malicious payloads. Employ runtime application self-protection (RASP) or Web Application Firewalls (WAF) with custom rules to detect and block suspicious prototype pollution patterns. For SSR environments, isolate server processes and apply strict resource limits to mitigate denial of service risks. Conduct thorough code reviews focusing on object merging utilities and avoid using vulnerable versions of 'mergeDeep' or similar functions. Monitor application logs for unusual behavior indicative of prototype pollution exploitation. Finally, maintain an inventory of Vuetify usage across projects to identify and remediate vulnerable instances promptly.