Vulnerability in Wso2 API Manager
CVE-2025-13736
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (19.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Wso2 API Manager
- Wso2 Identity Server
- Wso2 Identity Server As Key Manager
- Wso2 Open Banking Am
- Wso2 Open Banking Iam
- Wso2 API Manager — versions 0, 3.1.0, 3.2.0
- Wso2 Identity Server — versions 0, 5.10.0, 5.11.0
- Wso2 Identity Server As Key Manager — versions 0, 5.10.0
- Wso2 Open Banking Am — versions 0, 2.0.0
- Wso2 Open Banking Iam — versions 0, 2.0.0
Weakness classification (CWE)
References
- ed10eef1-636d-4fbe-9993-6890dfa878f8 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-13736?
- CVE-2025-13736 is a low-severity vulnerability in Wso2 API Manager, classified under Observable Discrepancy. CVSS score: 3.7/10. Published 2026-08-06.
- How severe is CVE-2025-13736?
- Low severity. CVSS v3 base score is 3.7 out of 10.