Vulnerability-Lookup

FKIE_CVE-2025-13166

Vulnerability from fkie_nvd - Published: 2026-09-15 10:17 - Updated: 2026-09-15 23:17

Severity

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

The SMS OTP flow fails to adequately handle error messages, allowing an attacker to infer the existence of registered user accounts based on the responses received during the OTP initiation process. This weakness can be exploited by an attacker to discover valid usernames within the system. The impact is amplified for accounts that have not configured a mobile number, as the enumeration is specifically tied to this condition. The discovery of these usernames can facilitate subsequent brute force attacks, social engineering attempts, and information leakage, potentially leading to reputational damage, loss of customer trust, and regulatory non-compliance.

References

	URL	Tags
	ed10eef1-636d-4fbe-9993-6890dfa878f8	https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4353/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "WSO2 Identity Server",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "7.1.0.40",
              "status": "affected",
              "version": "7.1.0",
              "versionType": "custom"
            },
            {
              "lessThan": "7.2.0.2",
              "status": "affected",
              "version": "7.2.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The SMS OTP flow fails to adequately handle error messages, allowing an attacker to infer the existence of registered user accounts based on the responses received during the OTP initiation process.\n\nThis weakness can be exploited by an attacker to discover valid usernames within the system. The impact is amplified for accounts that have not configured a mobile number, as the enumeration is specifically tied to this condition. The discovery of these usernames can facilitate subsequent brute force attacks, social engineering attempts, and information leakage, potentially leading to reputational damage, loss of customer trust, and regulatory non-compliance."
    }
  ],
  "id": "CVE-2025-13166",
  "lastModified": "2026-09-15T23:17:00.323",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-13166",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-15T12:43:12.334732Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-15T10:17:00.877",
  "references": [
    {
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
      "url": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4353/"
    }
  ],
  "sourceIdentifier": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "source": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
      "type": "Secondary"
    }
  ]
}

CVE-2025-13166 (GCVE-0-2025-13166)

Vulnerability from cvelistv5 – Published: 2026-09-15 09:53 – Updated: 2026-09-15 22:15

Title

Username Enumeration via SMS OTP Flow in WSO2 Identity Server Allows User Account Discovery

Summary

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 · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 12:43 UTC

CWE

CWE-203 - Information Exposure Through Predictable Error Conditions

Assigner

WSO2 mitre root

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
WSO2	WSO2 Identity Server	Affected: 7.1.0 , < 7.1.0.40 (custom) Affected: 7.2.0 , < 7.2.0.2 (custom) cpe:2.3:a:wso2:wso2_identity_server:::::::: cpe:2.3:a:wso2:wso2_identity_server::::::::

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-13166",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-15T12:43:12.334732Z",
                "version": "2.0.3"
              },
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            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-15T12:43:52.987Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "defaultStatus": "unaffected",
          "product": "WSO2 Identity Server",
          "vendor": "WSO2",
          "versions": [
            {
              "lessThan": "7.1.0.40",
              "status": "affected",
              "version": "7.1.0",
              "versionType": "custom"
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            {
              "lessThan": "7.2.0.2",
              "status": "affected",
              "version": "7.2.0",
              "versionType": "custom"
            }
          ]
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      ],
      "cpeApplicability": [
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          "nodes": [
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      ],
      "impacts": [
        {
          "capecId": "CAPEC-243",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-243 CAPEC-243: Username Enumeration"
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          ]
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      "metrics": [
        {
          "cvssV3_1": {
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            "attackVector": "NETWORK",
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            "integrityImpact": "NONE",
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      "providerMetadata": {
        "dateUpdated": "2026-09-15T22:15:37.413Z",
        "orgId": "ed10eef1-636d-4fbe-9993-6890dfa878f8",
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      "references": [
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      "solutions": [
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    "dateReserved": "2025-11-14T06:00:52.219Z",
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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.