# CVE-2024-0391: CVE-2024-0391

Status: published. Published: 2026-05-11. Updated: 2026-11-08.

The check user account lock states feature within the email OTP flow fails to validate user input, allowing an attacker to infer the existence of registered user accounts.

The discovery of valid usernames can increase the risk of brute-force and social engineering attacks. Attackers can leverage this information to craft targeted phishing campaigns or other malicious activities aimed at tricking users into divulging sensitive data, potentially damaging the organization's reputation and leading to regulatory non-compliance and financial consequences.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- wso2 / identity_server: ≥ 5.10.0; < 5.10.0.379 (affected, custom). Source: NVD
- wso2 / identity_server: ≥ 5.11.0; < 5.11.0.426 (affected, custom). Source: NVD
- wso2 / identity_server: ≥ 6.0.0; < 6.0.0.253 (affected, custom). Source: NVD
- wso2 / identity_server: ≥ 6.1.0; < 6.1.0.254 (affected, custom). Source: NVD
- wso2 / identity_server: ≥ 7.0.0; < 7.0.0.131 (affected, custom). Source: NVD
- wso2 / identity_server_as_key_manager: ≥ 5.10.0; < 5.10.267 (affected, custom). Source: NVD
- wso2 / open_banking_iam: ≥ 2.0.0; < 2.0.0.318 (affected, custom). Source: NVD

## NVD configuration conditions

Affected CPE matches depend on the following AND/OR and negation conditions:

```json
[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "5.10.0.379",
            "versionStartIncluding": "5.10.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "5.11.0.426",
            "versionStartIncluding": "5.11.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.0.0.253",
            "versionStartIncluding": "6.0.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "6.1.0.254",
            "versionStartIncluding": "6.1.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:wso2:identity_server:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "7.0.0.131",
            "versionStartIncluding": "7.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  },
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:wso2:identity_server_as_key_manager:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "5.10.267",
            "versionStartIncluding": "5.10.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  },
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:wso2:open_banking_iam:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "2.0.0.318",
            "versionStartIncluding": "2.0.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]
```

## Severity and prioritization

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N; source: NVD: nvd@nist.gov

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N; source: NVD: ed10eef1-636d-4fbe-9993-6890dfa878f8

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable yes; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-204

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/ (ed10eef1-636d-4fbe-9993-6890dfa878f8; Vendor Advisory)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-0391; retrieved 2026-11-09; source updated 2026-11-08

Revision: 0f6c5d90eb0bb322465f84482069ec63fcc2f2f3513b73db24cf44e9f5b605c3

Canonical: https://y2.dev/cve/CVE-2024-0391

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.