Vulnerability-Lookup

CVE-2025-5802 (GCVE-0-2025-5802)

Vulnerability from cvelistv5 – Published: 2026-09-15 09:53 – Updated: 2026-09-15 12:49

Title

Username Enumeration via Self Registration Flow in Multiple WSO2 Products Allows User Account Discovery

Summary

The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username, the system responds with an error message that explicitly indicates the username is already in use. This behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 12:48 UTC

CWE

CWE-203 - Information Disclosure Through Error Messages

Assigner

WSO2 mitre root

References

1 reference

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

Impacted products

10 products

Vendor	Product	Version	CPE status
WSO2	WSO2 API Manager	Unknown: 0 , < 3.1.0 (custom) Affected: 3.1.0 , < 3.1.0.354 (custom) Affected: 3.2.0 , < 3.2.0.458 (custom) Affected: 3.2.0 , < 3.2.0.478 (custom) Affected: 3.2.1 , < 3.2.1.96 (custom) Affected: 4.0.0 , < 4.0.0.379 (custom) Affected: 4.1.0 , < 4.1.0.262 (custom) Affected: 4.2.0 , < 4.2.0.200 (custom) Affected: 4.3.0 , < 4.3.0.112 (custom) Affected: 4.4.0 , < 4.4.0.72 (custom) Affected: 4.5.0 , < 4.5.0.55 (custom) Affected: 4.6.0 , < 4.6.0.17 (custom)	guessed
WSO2	WSO2 API Control Plane	Unknown: 0 , < 4.5.0 (custom) Affected: 4.5.0 , < 4.5.0.56 (custom) Affected: 4.6.0 , < 4.6.0.18 (custom)	guessed
WSO2	WSO2 Universal Gateway	Unknown: 0 , < 4.5.0 (custom) Affected: 4.5.0 , < 4.5.0.55 (custom) Affected: 4.6.0 , < 4.6.0.17 (custom)	guessed
WSO2	WSO2 Traffic Manager	Unknown: 0 , < 4.5.0 (custom) Affected: 4.5.0 , < 4.5.0.54 (custom) Affected: 4.6.0 , < 4.6.0.17 (custom)	guessed
WSO2	WSO2 Identity Server	Unknown: 0 , < 5.10.0 (custom) Affected: 5.10.0 , < 5.10.0.383 (custom) Affected: 5.11.0 , < 5.11.0.430 (custom) Affected: 6.0.0 , < 6.0.0.257 (custom) Affected: 6.1.0 , < 6.1.0.234 (custom) Affected: 6.1.0 , < 6.1.0.257 (custom) Affected: 7.0.0 , < 7.0.0.133 (custom) Affected: 7.1.0 , < 7.1.0.41 (custom) Affected: 7.2.0 , < 7.2.0.3 (custom)	guessed
WSO2	WSO2 Identity Server as Key Manager	Unknown: 0 , < 5.10.0 (custom) Affected: 5.10.0 , < 5.10.0.374 (custom)	guessed
WSO2	WSO2 Open Banking AM	Unknown: 0 , < 2.0.0 (custom) Affected: 2.0.0 , < 2.0.0.403 (custom)	guessed
WSO2	WSO2 Open Banking IAM	Unknown: 0 , < 2.0.0 (custom) Affected: 2.0.0 , < 2.0.0.423 (custom)	guessed
WSO2	WSO2 Carbon Identity Management Endpoint Util	Affected: 5.17.5 , < 5.17.5.332 (custom) Affected: 5.18.187 , < 5.18.187.330 (custom) Affected: 5.23.8 , < 5.23.8.213 (custom) Affected: 5.25.92 , < 5.25.92.167 (custom) Affected: 7.0.78 , < 7.0.78.162 (custom) Unaffected: x , ≤ * (custom)	guessed
WSO2	WSO2 Carbon Identity Application Authentication Framework	Affected: 5.17.5 , < 5.17.5.332 (custom) Affected: 5.18.187 , < 5.18.187.330 (custom) Unaffected: x , ≤ * (custom)	guessed

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FKIE_CVE-2025-5802

Vulnerability from fkie_nvd - Published: 2026-09-15 10:17 - Updated: 2026-09-15 13:16

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	ed10eef1-636d-4fbe-9993-6890dfa878f8	https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4227/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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              "version": "3.1.0",
              "versionType": "custom"
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              "versionType": "custom"
            },
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              "status": "affected",
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              "versionType": "custom"
            },
            {
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              "status": "affected",
              "version": "3.2.1",
              "versionType": "custom"
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            },
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            },
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              "status": "affected",
              "version": "5.25.92",
              "versionType": "custom"
            },
            {
              "lessThan": "7.0.78.162",
              "status": "affected",
              "version": "7.0.78",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "x",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "packageName": "org.wso2.carbon.identity.framework:org.wso2.carbon.identity.application.authentication.framework",
          "product": "WSO2 Carbon Identity Application Authentication Framework",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "5.17.5.332",
              "status": "affected",
              "version": "5.17.5",
              "versionType": "custom"
            },
            {
              "lessThan": "5.18.187.330",
              "status": "affected",
              "version": "5.18.187",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "x",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username, the system responds with an error message that explicitly indicates the username is already in use.\n\nThis behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns."
    }
  ],
  "id": "CVE-2025-5802",
  "lastModified": "2026-09-15T13:16:40.277",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-5802",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-15T12:48:59.851340Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-15T10:17:02.640",
  "references": [
    {
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
      "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4227/"
    }
  ],
  "sourceIdentifier": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
      "type": "Secondary"
    }
  ]
}

GHSA-6CGX-WC6Q-RRJ4

Vulnerability from github – Published: 2026-09-15 12:31 – Updated: 2026-09-15 12:31

Details

This behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns.

Severity

5.3 (Medium)


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

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2025-5802"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-15T10:17:02Z",
    "severity": "MODERATE"
  },
  "details": "The self-registration flow accepts user-supplied input for usernames without adequately preventing the disclosure of username existence. When a user attempts to register with an existing username, the system responds with an error message that explicitly indicates the username is already in use.\n\nThis behavior allows an attacker to discover valid usernames within the system. The discovery of valid usernames can facilitate subsequent attacks such as brute force, social engineering, and targeted phishing campaigns.",
  "id": "GHSA-6cgx-wc6q-rrj4",
  "modified": "2026-09-15T12:31:45Z",
  "published": "2026-09-15T12:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-5802"
    },
    {
      "type": "WEB",
      "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4227"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-5802 (GCVE-0-2025-5802)

FKIE_CVE-2025-5802

GHSA-6CGX-WC6Q-RRJ4

Tags

Sightings

Nomenclature

Related by attack behaviour