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.
Published: 2026-08-06
Score: 2.4 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4619/#solution

Tracking

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Advisories

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History

Thu, 06 Aug 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 06 Aug 2026 08:15:00 +0000

Type Values Removed Values Added
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.
Title Improper Refresh Token Implementation via User Impersonation Flow in WSO2 Identity Server Enables Continued Unauthorized Actions
First Time appeared Wso2
Wso2 wso2 Carbon Oauth
Wso2 wso2 Identity Server
Weaknesses CWE-613
CPEs cpe:2.3:a:wso2:wso2_carbon_oauth:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 wso2 Carbon Oauth
Wso2 wso2 Identity Server
References
Metrics cvssV3_1

{'score': 2.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N'}


Subscriptions

Wso2 Wso2 Carbon Oauth Wso2 Identity Server
cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-08-06T12:33:46.393Z

Reserved: 2025-11-03T08:28:21.947Z

Link: CVE-2025-12627

cve-icon Vulnrichment

Updated: 2026-08-06T12:33:43.358Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-06T09:30:02Z

Weaknesses