Description
A cross-tenant authentication vulnerability exists in multiple WSO2 products due to improper cryptographic design in Adaptive Authentication. A single cryptographic key is used across all tenants to sign authentication cookies, allowing a privileged user in one tenant to forge authentication cookies for users in other tenants. Because the Auto-Login feature is enabled by default, this flaw may allow an attacker to gain unauthorized access and potentially take over accounts in other tenants. Successful exploitation requires access to Adaptive Authentication functionality, which is typically restricted to high-privileged users. The vulnerability is only exploitable when Auto-Login is enabled, reducing its practical impact in deployments where the feature is disabled.
CVSS breakdown
Affected products
- WSO2 / WSO2 Identity Server7.0.0 – 7.0.0.88
- WSO2 / WSO2 Identity Server5.11.0 – 5.11.0.392
- WSO2 / WSO2 Identity Server6.0.0 – 6.0.0.228
- WSO2 / WSO2 Identity Server6.1.0 – 6.1.0.220
- WSO2 / WSO2 Identity Server0 – 5.10.0
- WSO2 / WSO2 Identity Server5.10.0 – 5.10.0.343
- WSO2 / WSO2 Identity Server as Key Manager0 – 5.10.0
- WSO2 / WSO2 Identity Server as Key Manager5.10.0 – 5.10.0.336
- WSO2 / WSO2 Open Banking IAM2.0.0 – 2.0.0.387