Description
The refresh token grant type in WSO2 products fails to re-validate account status before issuing new access tokens. This weakness allows an attacker to obtain valid access tokens for user accounts even after they have been blocked by the user store, bypassing account lockout mechanisms.
This vulnerability can lead to unauthorized access to user accounts and their associated resources. Attackers can leverage this to perform actions on behalf of blocked users, potentially leading to privilege escalation or data exfiltration depending on the permissions of the compromised account.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| WSO2 | WSO2 API Manager | 3.1.0 – < 3.1.0.308, 3.2.0 – < 3.2.0.429, 3.2.1 – < 3.2.1.49, 4.0.0 – < 4.0.0.315, 4.1.0 – < 4.1.0.214, 4.2.0 – < 4.2.0.149, 4.3.0 – < 4.3.0.62, 4.4.0 – < 4.4.0.25, 4.5.0 – < 4.5.0.9 | 3.1.0.308 |
| WSO2 | WSO2 Universal Gateway | 4.5.0 – < 4.5.0.9 | 4.5.0.9 |
| WSO2 | WSO2 Traffic Manager | 4.5.0 – < 4.5.0.9 | 4.5.0.9 |
| WSO2 | WSO2 API Control Plane | 4.5.0 – < 4.5.0.10 | 4.5.0.10 |
| WSO2 | WSO2 Identity Server as Key Manager | 5.10.0 – < 5.10.0.324 | 5.10.0.324 |
| WSO2 | WSO2 Identity Server | 5.10.0 – < 5.10.0.331, 5.11.0 – < 5.11.0.376, 6.0.0 – < 6.0.0.219, 6.1.0 – < 6.1.0.205, 7.0.0 – < 7.0.0.73 | 5.10.0.331 |
| WSO2 | WSO2 Open Banking AM | 2.0.0 – < 2.0.0.357 | 2.0.0.357 |
| WSO2 | WSO2 Open Banking IAM | 2.0.0 – < 2.0.0.377 | 2.0.0.377 |
| WSO2 | WSO2 Carbon OAuth | 6.4.2 – < 6.4.2.148, 6.4.111 – < 6.4.111.122, 6.4.176 – < 6.4.176.26, 6.4.180 – < 6.4.180.10, 6.8.0 – < 6.8.0.44, 6.9.6 – < 6.9.6.21, 6.11.21 – < 6.11.21.64, 6.13.16 – < 6.13.16.13, 6.13.19 – < 6.13.19.7, 6.13.27 – < 6.13.27.1, 7.0.26 – < 7.0.26.37 | 6.4.2.148 |
Advisories 1
- WID-SEC-2026-4296 WSO2 API Manager: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Nov 2, 2026