Security Advisory WSO2-2025-4353/CVE-2025-13166¶
Published: 2026-05-03
Version: 1.0.0
Severity: Low
CVSS Score: 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)
CVE IDs: CVE-2025-13166
AFFECTED PRODUCTS¶
- WSO2 Identity Server: 7.2.0, 7.1.0
OVERVIEW¶
Potential username enumeration.
DESCRIPTION¶
Due to improper error message handling in the SMS OTP flow, an attacker could exploit this behavior to enumerate registered users. This issue affects only accounts that have not configured a mobile number.
IMPACT¶
The discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and information leakage. Attackers can use the list of usernames to craft targeted phishing emails or other social engineering attacks to trick users into divulging sensitive information. Moreover, the presence of username enumeration could damage the reputation of the organization responsible for the system and lead to loss of customer trust, regulatory non-compliance, and legal and financial consequences.
SOLUTION¶
Community Users (Open Source)¶
Apply the relevant fixes to your product using the public fix(es) provided below.
If applying the fix or update is not feasible, migrate to the latest unaffected version of the respective WSO2 product(s).
Support Subscription Holders¶
Update your product to the specified update level, or to a higher update level, to mitigate the identified vulnerability.
Info
WSO2 Support Subscription Holders may use WSO2 Updates in order to apply the fix.
| Product Name | Product Version | Update Level |
|---|---|---|
| WSO2 Identity Server | 7.2.0 | 2 |
| WSO2 Identity Server | 7.1.0 | 40 |