How severe is CVE-2025-1396?

CVE-2025-1396 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-1396 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-1396?

CVE-2025-1396 primarily affects Wso2 Identity Server. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-1396?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-1396 have an EU (EUVD) identifier?

Yes. CVE-2025-1396 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31223.

When was CVE-2025-1396 published?

CVE-2025-1396 was published on 2025-09-26 and last updated on 2026-06-17.

CVE-2025-1396

CVE-2025-1396 is a low-severity vulnerability in Wso2 Identity Server with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31223
Weakness: CWE-203
Affected product: Wso2 Identity Server
Published: 2025-09-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-1396?: 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.
How severe is CVE-2025-1396?: CVE-2025-1396 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-1396 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-1396?: CVE-2025-1396 primarily affects Wso2 Identity Server. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-1396?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-1396 have an EU (EUVD) identifier?: Yes. CVE-2025-1396 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31223.
When was CVE-2025-1396 published?: CVE-2025-1396 was published on 2025-09-26 and last updated on 2026-06-17.

References

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

Affected products (6)

cpe:2.3:a:wso2:identity_server:5.10.0:*:*:*:*:*:*:*
cpe:2.3:a:wso2:identity_server:5.11.0:*:*:*:*:*:*:*
cpe:2.3:a:wso2:identity_server:6.0.0:*:*:*:*:*:*:*
cpe:2.3:a:wso2:identity_server:6.1.0:*:*:*:*:*:*:*
cpe:2.3:a:wso2:identity_server_as_key_manager:5.10.0:*:*:*:*:*:*:*
cpe:2.3:a:wso2:open_banking_iam:2.0.0:*:*:*:*:*:*:*

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