A vulnerability classified as critical has been found in chillzhuang SpringBlade 4.1.0. Affected is an unknown function of the file /api/blade-system/menu/list?updatexml. The manipulation leads to sql injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

SpringBlade versions from 2.7.3 up to but not including 5.0.0 contain a privilege escalation vulnerability that allows authenticated attackers to create system administrator accounts by sending crafted POST requests to an unprotected internal Feign user-creation endpoint exposed via @RestController without authorization checks. Attackers can exploit the gateway's authentication filter, which only validates JWT parsing without verifying user roles or caller identity, and leverage a hardcoded JWT signing key embedded in publicly available JARs to forge tokens and escalate privileges from a low-privilege user to administrator, enabling cross-tenant data pollution and persistent backdoor access.

An issue discovered in SpringBlade 3.7.1 allows attackers to obtain sensitive information via crafted GET request to api/blade-system/tenant.