GHSA-JC5M-WRP2-QQ38

Vulnerability from github – Published: 2026-03-05 21:58 – Updated: 2026-03-05 21:58
VLAI
Summary
Flowise Vulnerable to PII Disclosure on Unauthenticated Forgot Password Endpoint
Details

Summary

The /api/v1/account/forgot-password endpoint returns the full user object including PII (id, name, email, status, timestamps) in the response body instead of a generic success message. This exposes sensitive user information to unauthenticated attackers who only need to know a valid email address.

Vulnerability Details

Field Value
CWE CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected File packages/server/src/enterprise/services/account.service.ts (lines 517-545)
Endpoint POST /api/v1/account/forgot-password
Authentication None required
CVSS 3.1 3.7 (Low)

Root Cause

In account.service.ts, the forgotPassword method returns the sanitized user object instead of a simple success acknowledgment:

public async forgotPassword(data: AccountDTO) {
    // ...
    const user = await this.userService.readUserByEmail(data.user.email, queryRunner)
    if (!user) throw new InternalFlowiseError(StatusCodes.NOT_FOUND, UserErrorMessage.USER_NOT_FOUND)

    data.user = user
    // ... password reset logic ...

    return sanitizeUser(data.user)  // Returns user object with PII
}

The sanitizeUser function only removes sensitive authentication fields:

export function sanitizeUser(user: Partial<User>) {
    delete user.credential    // password hash
    delete user.tempToken     // reset token
    delete user.tokenExpiry

    return user  // Still contains: id, name, email, status, createdDate, updatedDate
}

Impact

An unauthenticated attacker can:

  1. Harvest PII: Collect user IDs, full names, and account metadata
  2. Profile users: Determine account creation dates and activity patterns
  3. Enumerate accounts: Confirm email existence and gather associated data
  4. Enable further attacks: Use harvested data for social engineering or targeted phishing

Exploitation

curl -X POST "https://cloud.flowiseai.com/api/v1/account/forgot-password" \
  -H "Content-Type: application/json" \
  -d '{"user":{"email":"victim@example.com"}}'

Evidence

Request:

POST /api/v1/account/forgot-password HTTP/1.1
Host: cloud.flowiseai.com
Content-Type: application/json

{"user":{"email":"vefag54010@naprb.com"}}

Response (201 Created):

{
    "id": "56c3fc72-4e85-49c9-a4b5-d1a46b373a12",
    "name": "Vefag naprb",
    "email": "vefag54010@naprb.com",
    "status": "active",
    "createdDate": "2026-01-17T15:21:59.152Z",
    "updatedDate": "2026-01-17T15:35:06.492Z",
    "createdBy": "56c3fc72-4e85-49c9-a4b5-d1a46b373a12",
    "updatedBy": "56c3fc72-4e85-49c9-a4b5-d1a46b373a12"
}

screenshot

Exposed Data

Field Risk
id Internal user UUID - enables targeted attacks
name Full name - PII disclosure
email Email confirmation
status Account state information
createdDate User profiling
updatedDate Activity tracking
createdBy / updatedBy Internal reference leak

Expected Behavior

A secure forgot-password endpoint should return a generic response regardless of whether the email exists:

{"message": "If this email exists, a password reset link has been sent."}

References

Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.0.12"
      },
      "package": {
        "ecosystem": "npm",
        "name": "flowise"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-200"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-05T21:58:02Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "## Summary\n\nThe `/api/v1/account/forgot-password` endpoint returns the full user object including PII (id, name, email, status, timestamps) in the response body instead of a generic success message. This exposes sensitive user information to unauthenticated attackers who only need to know a valid email address.\n\n## Vulnerability Details\n\n| Field | Value |\n|-------|-------|\n| CWE | CWE-200: Exposure of Sensitive Information to an Unauthorized Actor |\n| Affected File | `packages/server/src/enterprise/services/account.service.ts` (lines 517-545) |\n| Endpoint | `POST /api/v1/account/forgot-password` |\n| Authentication | None required |\n| CVSS 3.1 | 3.7 (Low) |\n\n## Root Cause\n\nIn `account.service.ts`, the `forgotPassword` method returns the sanitized user object instead of a simple success acknowledgment:\n\n```typescript\npublic async forgotPassword(data: AccountDTO) {\n    // ...\n    const user = await this.userService.readUserByEmail(data.user.email, queryRunner)\n    if (!user) throw new InternalFlowiseError(StatusCodes.NOT_FOUND, UserErrorMessage.USER_NOT_FOUND)\n\n    data.user = user\n    // ... password reset logic ...\n\n    return sanitizeUser(data.user)  // Returns user object with PII\n}\n```\n\nThe `sanitizeUser` function only removes sensitive authentication fields:\n\n```typescript\nexport function sanitizeUser(user: Partial\u003cUser\u003e) {\n    delete user.credential    // password hash\n    delete user.tempToken     // reset token\n    delete user.tokenExpiry\n\n    return user  // Still contains: id, name, email, status, createdDate, updatedDate\n}\n```\n\n## Impact\n\nAn unauthenticated attacker can:\n\n1. **Harvest PII**: Collect user IDs, full names, and account metadata\n2. **Profile users**: Determine account creation dates and activity patterns\n3. **Enumerate accounts**: Confirm email existence and gather associated data\n4. **Enable further attacks**: Use harvested data for social engineering or targeted phishing\n\n## Exploitation\n\n```bash\ncurl -X POST \"https://cloud.flowiseai.com/api/v1/account/forgot-password\" \\\n  -H \"Content-Type: application/json\" \\\n  -d \u0027{\"user\":{\"email\":\"victim@example.com\"}}\u0027\n```\n\n### Evidence\n\n**Request:**\n```http\nPOST /api/v1/account/forgot-password HTTP/1.1\nHost: cloud.flowiseai.com\nContent-Type: application/json\n\n{\"user\":{\"email\":\"vefag54010@naprb.com\"}}\n```\n\n**Response (201 Created):**\n```json\n{\n    \"id\": \"56c3fc72-4e85-49c9-a4b5-d1a46b373a12\",\n    \"name\": \"Vefag naprb\",\n    \"email\": \"vefag54010@naprb.com\",\n    \"status\": \"active\",\n    \"createdDate\": \"2026-01-17T15:21:59.152Z\",\n    \"updatedDate\": \"2026-01-17T15:35:06.492Z\",\n    \"createdBy\": \"56c3fc72-4e85-49c9-a4b5-d1a46b373a12\",\n    \"updatedBy\": \"56c3fc72-4e85-49c9-a4b5-d1a46b373a12\"\n}\n```\n\n\u003cimg width=\"1582\" height=\"791\" alt=\"screenshot\" src=\"https://github.com/user-attachments/assets/9880f037-6e21-41d7-a7c8-7057c6775b50\" /\u003e\n\n## Exposed Data\n\n| Field | Risk |\n|-------|------|\n| `id` | Internal user UUID - enables targeted attacks |\n| `name` | Full name - PII disclosure |\n| `email` | Email confirmation |\n| `status` | Account state information |\n| `createdDate` | User profiling |\n| `updatedDate` | Activity tracking |\n| `createdBy` / `updatedBy` | Internal reference leak |\n\n## Expected Behavior\n\nA secure forgot-password endpoint should return a generic response regardless of whether the email exists:\n\n```json\n{\"message\": \"If this email exists, a password reset link has been sent.\"}\n```\n\n## References\n\n- [CWE-200: Exposure of Sensitive Information](https://cwe.mitre.org/data/definitions/200.html)\n- [OWASP Authentication Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Authentication_Cheat_Sheet.html#password-recovery)",
  "id": "GHSA-jc5m-wrp2-qq38",
  "modified": "2026-03-05T21:58:02Z",
  "published": "2026-03-05T21:58:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-jc5m-wrp2-qq38"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/FlowiseAI/Flowise"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Flowise Vulnerable to PII Disclosure on Unauthenticated Forgot Password Endpoint"
}



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