WSO2 API Manager Self-Registration Flow information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in WSO2 API Manager, API Control Plane, Carbon Identity Application Authentication Framework, Carbon Identity Management Endpoint Util, Identity Server, Identity Server as Key Manager, Open Banking AM, Open Banking IAM, Traffic Manager and Universal Gateway. The impacted element is an unknown function of the component Self-Registration Flow. Executing a manipulation can lead to information disclosure. This vulnerability is tracked as CVE-2025-5802. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in WSO2 API Manager, API Control Plane, Carbon Identity Application Authentication Framework, Carbon Identity Management Endpoint Util, Identity Server, Identity Server as Key Manager, Open Banking AM, Open Banking IAM, Traffic Manager and Universal Gateway. This vulnerability affects an unknown part of the component Self-Registration Flow. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username, the system responds with an error message that explicitly indicates the username is already in use. This behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns.

The advisory is shared for download at security.docs.wso2.com. This vulnerability was named CVE-2025-5802 since 06/06/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/15/2026). The MITRE ATT&CK project declares the attack technique as T1592.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Banking Software

Vendor

• WSO2

Name

• API Control Plane
• API Manager
• Carbon Identity Application Authentication Framework
• Carbon Identity Management Endpoint Util
• Identity Server
• Identity Server as Key Manager
• Open Banking AM
• Open Banking IAM
• Traffic Manager
• Universal Gateway

License

• commercial

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CPE 2.2info

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