Vulnerability-Lookup

CVE-2025-13736 (GCVE-0-2025-13736)

Vulnerability from cvelistv5 – Published: 2026-08-06 07:33 – Updated: 2026-08-06 12:35

Title

Username Enumeration via Login Interface in Multiple WSO2 Products Allows User Account Discovery

Summary

When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of the validate_username configuration. The discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data.

Severity

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-203 - Information Disclosure Through Error Messages

Assigner

WSO2

References

1 reference

URL	Tags
https://security.docs.wso2.com/en/latest/security…	vendor-advisory

Impacted products

5 products

Vendor	Product	Version
WSO2	WSO2 Identity Server as Key Manager	Unknown: 0 , < 5.10.0 (custom) Affected: 5.10.0 , < 5.10.0.371 (custom)
WSO2	WSO2 Identity Server	Unknown: 0 , < 5.10.0 (custom) Affected: 5.10.0 , < 5.10.0.380 (custom) Affected: 5.11.0 , < 5.11.0.427 (custom) Affected: 6.0.0 , < 6.0.0.254 (custom) Affected: 6.1.0 , < 6.1.0.255 (custom) Affected: 7.0.0 , < 7.0.0.132 (custom) Affected: 7.1.0 , < 7.1.0.40 (custom) Affected: 7.2.0 , < 7.2.0.2 (custom)
WSO2	WSO2 Open Banking AM	Unknown: 0 , < 2.0.0 (custom) Affected: 2.0.0 , < 2.0.0.400 (custom)
WSO2	WSO2 API Manager	Unknown: 0 , < 3.1.0 (custom) Affected: 3.1.0 , < 3.1.0.351 (custom) Affected: 3.2.0 , < 3.2.0.455 (custom) Affected: 4.0.0 , < 4.0.0.375 (custom)
WSO2	WSO2 Open Banking IAM	Unknown: 0 , < 2.0.0 (custom) Affected: 2.0.0 , < 2.0.0.420 (custom)

Show details on NVD website

JSON

To clipboard

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GHSA-G8W9-P6WX-8FXC

Vulnerability from github – Published: 2026-08-06 09:30 – Updated: 2026-08-06 09:30

Details

The discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data.

Severity

3.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-06T08:16:28Z",
    "severity": "LOW"
  },
  "details": "When Multi-Attribute Login is enabled, the login interface fails to consistently mask the existence of user accounts. For valid users, the server resolves and displays their canonical username, while for non-existent users, it echoes the original input. This occurs regardless of the validate_username configuration.\n\nThe discovery of valid usernames can increase the risk of brute force attacks, social engineering attacks, and targeted information leakage. Attackers can leverage this information to craft more effective phishing campaigns or social engineering tactics to compromise user accounts or extract sensitive data.",
  "id": "GHSA-g8w9-p6wx-8fxc",
  "modified": "2026-08-06T09:30:30Z",
  "published": "2026-08-06T09:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-13736"
    },
    {
      "type": "WEB",
      "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4013"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2025-13736 (GCVE-0-2025-13736)

GHSA-G8W9-P6WX-8FXC

Tags

Sightings

Nomenclature