WSO2 Universal Gateway vulnerabilities

4 CVEs affecting WSO2 Universal Gateway, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-5802, published 2026-09-15.

Highest priority

Known exploited (CISA KEV) first, then by EPSS exploit probability.

CVE-2026-3418, published 2026-08-06. Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days. The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations.…
CVE-2026-3415, published 2026-08-06. High severity, CVSS 8.7. EPSS: 0.5% chance of exploitation in the next 30 days. The XML and schema validation functionalities within the SchemaValidator Mediator process XML input as part of validation flows. Under certain conditions, the XML parser allows the resolution of…
CVE-2025-14561, published 2026-08-06. Critical severity, CVSS 9.0. EPSS: 0.4% chance of exploitation in the next 30 days. In multi-tenant deployments, the Publisher REST APIs fail to enforce tenant isolation correctly. This allows a user in one tenant, possessing sufficient privileges to invoke these APIs, to perform…
CVE-2025-5802, published 2026-09-15. Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days. The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username,…