Username Enumeration via SMS OTP Flow in WSO2 Identity Server Allows User Account Discovery
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WSO2 | WSO2 Identity Server | unaffected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wso2 | Wso2 Identity Server |
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Vendor Solution
Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4353/#solution
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.269% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:* |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wso2
Wso2 wso2 Identity Server |
|
| Vendors & Products |
Wso2
Wso2 wso2 Identity Server |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The SMS OTP flow fails to adequately handle error messages, allowing an attacker to infer the existence of registered user accounts based on the responses received during the OTP initiation process. This weakness can be exploited by an attacker to discover valid usernames within the system. The impact is amplified for accounts that have not configured a mobile number, as the enumeration is specifically tied to this condition. The discovery of these usernames can facilitate subsequent brute force attacks, social engineering attempts, and information leakage, potentially leading to reputational damage, loss of customer trust, and regulatory non-compliance. | |
| Title | Username Enumeration via SMS OTP Flow in WSO2 Identity Server Allows User Account Discovery | |
| Weaknesses | CWE-203 | |
| References |
| |
| Metrics |
cvssV3_1
|