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CVE-2025-1396

Username Enumeration in Multiple WSO2 Products with Multi-Attribute Login Enabled

3.7 Low

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.25%Up 0.2 points since Sep 26, 2025
90%50%10%1%

What each source reports

CVE List Score used 3.7

Username Enumeration in Multiple WSO2 Products with Multi-Attribute Login Enabled

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.

Record
CVE-2025-1396
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203
Updated
2026-11-02
EUVDEUVD-2025-31223 3.7

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.

Record
EUVD-2025-31223
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-w82p-r9vw-4rg5 3.7

WSO2's Input Validation Management Service contains Observable Discrepancy when Multi-Attribute Login is enabled

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.

There is a fix available in version 7.8.491, however it has not been published to the Maven registry.

Record
GHSA-w82p-r9vw-4rg5
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203
Updated
2026-11-02
NVD 3.7

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.

Record
CVE-2025-1396
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203
Updated
2026-11-02
OSVGHSA-w82p-r9vw-4rg5 3.7

WSO2's Input Validation Management Service contains Observable Discrepancy when Multi-Attribute Login is enabled

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.

There is a fix available in version 7.8.491, however it has not been published to the Maven registry.

Record
GHSA-w82p-r9vw-4rg5
CVSS 3.1
3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-203
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.wso2.carbon.identity.framework:org.wso2.carbon.identity.input.validation.mgt
Maven
through 7.8.103 None known
org.wso2.carbon.identity.framework:org.wso2.carbon.identity.input.validation.mgt
Maven
through 7.8.103, plus listed versions
5.25.1005.25.1015.25.1025.25.1035.25.104
Show 45 moreShow less
5.25.1055.25.1065.25.1075.25.1085.25.1095.25.1105.25.1115.25.1125.25.1135.25.1145.25.1155.25.1205.25.1215.25.1225.25.1235.25.1245.25.1255.25.1265.25.1275.25.1285.25.1295.25.1305.25.1315.25.1325.25.1335.25.1345.25.1355.25.1365.25.1375.25.1385.25.1395.25.1405.25.1415.25.1425.25.1435.25.1445.25.1455.25.1465.25.1475.25.1485.25.1495.25.1505.25.1515.25.1525.25.153
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-1396 is a low vulnerability (CVSS 3.7) in Wso2 Identity Server, published September 26, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.25%, the 16th percentile. No source names a fixed version.

References

This page doesn't list everything

Left out here: 370 versions. The JSON record has them.

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