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CVE-2025-13736

LOWCVSS 3.7/10EPSS 0.17%

Last modified

CVE-2025-13736 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
3.7/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability
0.17%

6.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
WSO2WSO2 Identity Server as Key Manager< 5.10.0; >= 5.10.0, < 5.10.0.371
WSO2WSO2 Identity Server< 5.10.0; >= 5.10.0, < 5.10.0.380; >= 5.11.0, < 5.11.0.427; >= 6.0.0, < 6.0.0.254; >= 6.1.0, < 6.1.0.255; >= 7.0.0, < 7.0.0.132; >= 7.1.0, < 7.1.0.40; >= 7.2.0, < 7.2.0.2
WSO2WSO2 Open Banking AM< 2.0.0; >= 2.0.0, < 2.0.0.400
WSO2WSO2 API Manager< 3.1.0; >= 3.1.0, < 3.1.0.351; >= 3.2.0, < 3.2.0.455; >= 4.0.0, < 4.0.0.375
WSO2WSO2 Open Banking IAM< 2.0.0; >= 2.0.0, < 2.0.0.420

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is 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.
How severe is CVE-2025-13736?
CVE-2025-13736 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2025-13736?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST