CVE-2025-13736

Low

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.

SeverityLow
CVSS3.7
Exploit probability—
ProductWso2 Api Manager
PublishedAug 6, 2026
First seenAug 6, 2026
Weakness typeCWE-203CWE-203

How to fix

Update
  • wso2 api_manager3.1.0.351, 3.2.0.455, 4.0.0.375 or later
  • wso2 identity_server5.10.0.380, 5.11.0.427, 6.0.0.254, 6.1.0.255, 7.0.0.132, 7.1.0.40, 7.2.0.2 or later
  • wso2 identity_server_as_key_manager5.10.0.371 or later
  • wso2 open_banking_am2.0.0.400 or later
  • wso2 open_banking_iam2.0.0.420 or later

Affected products

ProductAffected versionsFixed in
wso2 api_manager3.1.0 ≤ v < 3.1.0.351, 3.2.0 ≤ v < 3.2.0.455, 4.0.0 ≤ v < 4.0.0.3753.1.0.351, 3.2.0.455, 4.0.0.375
wso2 identity_server5.10.0 ≤ v < 5.10.0.380, 5.11.0 ≤ v < 5.11.0.427, 6.0.0 ≤ v < 6.0.0.254, 6.1.0 ≤ v < 6.1.0.255, 7.0.0 ≤ v < 7.0.0.132, 7.1.0 ≤ v < 7.1.0.40, 7.2.0 ≤ v < 7.2.0.25.10.0.380, 5.11.0.427, 6.0.0.254, 6.1.0.255, 7.0.0.132, 7.1.0.40, 7.2.0.2
wso2 identity_server_as_key_manager5.10.0 ≤ v < 5.10.0.3715.10.0.371
wso2 open_banking_am2.0.0 ≤ v < 2.0.0.4002.0.0.400
wso2 open_banking_iam2.0.0 ≤ v < 2.0.0.4202.0.0.420

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CVE-2025-13736 · Wso2 Api Manager · Dark Radar