CVE-2025-13736
Analyzed
Analyzed - Analysis Complete
Information Disclosure in Multi-Attribute Login System
Vulnerability report for CVE-2025-13736, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-08-06
Last updated on: 2026-08-12
Assigner: WSO2 LLC
Description
Description
When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of the validate_username configuration.
The discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wso2 | identity_server | From 7.0.0 (inc) to 7.0.0.132 (exc) |
| wso2 | identity_server | From 7.1.0 (inc) to 7.1.0.40 (exc) |
| wso2 | api_manager | From 3.1.0 (inc) to 3.1.0.351 (exc) |
| wso2 | api_manager | From 3.2.0 (inc) to 3.2.0.455 (exc) |
| wso2 | api_manager | From 4.0.0 (inc) to 4.0.0.375 (exc) |
| wso2 | identity_server | From 5.11.0 (inc) to 5.11.0.427 (exc) |
| wso2 | identity_server | From 6.0.0 (inc) to 6.0.0.254 (exc) |
| wso2 | identity_server | From 6.1.0 (inc) to 6.1.0.255 (exc) |
| wso2 | identity_server | From 7.2.0 (inc) to 7.2.0.2 (exc) |
| wso2 | identity_server_as_key_manager | From 5.10.0 (inc) to 5.10.0.371 (exc) |
| wso2 | open_banking_am | From 2.0.0 (inc) to 2.0.0.400 (exc) |
| wso2 | open_banking_iam | From 2.0.0 (inc) to 2.0.0.420 (exc) |
| wso2 | identity_server | From 5.10.0 (inc) to 5.10.0.380 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-203 | The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. |
