VulnerabilityAnalyzed

CVE-2025-1396

A username enumeration vulnerability exists in multiple WSO2 products when Multi-Attribute Login is enabled.

MEDIUM 5.3EPSS 0.25%

Does this matter?

Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.

Description

A username enumeration vulnerability exists in multiple WSO2 products when Multi-Attribute Login is enabled. In this configuration, the system returns a distinct "User does not exist" error message to the login form, regardless of the validate_username setting. This behavior allows malicious actors to determine which usernames exist in the system based on observable discrepancies in the application's responses. Exploitation of this vulnerability could aid in brute-force attacks, targeted phishing campaigns, or other social engineering techniques by confirming the validity of user identifiers within the system.

CVSS 3.1: 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.25% probability · 17th percentile
CISA KEV: Not listed
Weakness: CWE-203
Affected: wso2/identity server · wso2/identity server as key manager · wso2/open banking iam
Source: ed10eef1-636d-4fbe-9993-6890dfa878f8

References

https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3983/Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.