Username Enumeration via Authentication Endpoint in WSO2 Identity Server Allows User Account Discovery
The authentication endpoint of WSO2 Identity Server fails to provide a consistent system response when a username does not exist in the system, allowing attackers to differentiate between valid and invalid usernames. This difference in responses can be leveraged to enumerate existing user accounts. Successful exploitation enables an attacker to discover valid usernames within the system, significantly increasing the risk of subsequent attacks such as brute force attacks on user credentials, social engineering attacks, and information leakage. The discovered usernames can be used to craft targeted phishing emails or other social engineering campaigns.
CVE-2025-13591
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-13591
WSO2 Identity Server
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
WSO2 Carbon Abstract OTP Authenticator
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Email OTP Authenticator
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "WSO2",
"product": "WSO2 Identity Server",
"versions": [
{
"status": "unknown",
"version": "0",
"lessThan": "7.0.0",
"versionType": "custom"
},
{
"status": "affected",
"version": "7.0.0",
"lessThan": "7.0.0.134",
"versionType": "custom"
},
{
"status": "affected",
"version": "7.1.0",
"lessThan": "7.1.0.42",
"versionType": "custom"
}
],
"defaultStatus": "unaffected"
},
{
"vendor": "WSO2",
"product": "WSO2 Carbon Abstract OTP Authenticator",
"versions": [
{
"status": "affected",
"version": "1.0.5",
"lessThan": "1.0.5.3",
"versionType": "custom"
},
{
"status": "affected",
"version": "1.0.10",
"lessThan": "1.0.10.2",
"versionType": "custom"
}
],
"packageName": "org.wso2.carbon.identity.auth.otp.commons:org.wso2.carbon.identity.auth.otp.core",
"defaultStatus": "unknown"
},
{
"vendor": "WSO2",
"product": "Email OTP Authenticator",
"versions": [
{
"status": "affected",
"version": "1.0.18",
"lessThan": "1.0.18.8",
"versionType": "custom"
},
{
"status": "affected",
"version": "1.0.30",
"lessThan": "1.0.30.5",
"versionType": "custom"
}
],
"packageName": "org.wso2.carbon.identity.local.auth.emailotp:org.wso2.carbon.identity.local.auth.emailotp",
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2025-13591
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #42569 · Revision 1
- Added to Heist Feed
- Publisher date