Vulnerability · Published Aug 6, 2026 · Assigned by WSO2
CVE-2025-12627Improper Refresh Token Implementation via User Impersonation Flow in WSO2 Identity Server Enables Continued Unauthorized Actions
Low 2.4
In plain English
A low-severity security flaw in WSO2 Carbon OAuth from WSO2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Official description
The user impersonation flow in WSO2 Identity Server fails to properly manage refresh tokens associated with impersonated sessions. This allows an attacker who has obtained an access token for an impersonated user to leverage the refresh token grant to obtain new access tokens, extending their ability to act as the legitimate user. An attacker who gains access to an impersonated user's access token can exploit this weakness to renew their authorization. This results in the continued ability to perform actions on behalf of the actual user, compromising log integrity and traceability by masking the true actor.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WSO2 | WSO2 Identity Server | 7.0.0 – before 7.0.0.1307.1.0 – before 7.1.0.38 |
| WSO2 | WSO2 Carbon OAuth | 7.0.26 – before 7.0.26.837.0.259 – before 7.0.259.31 |
Weakness: CWE-613 · Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N