Common Weakness Enumeration

CWE-639

Allowed

Authorization Bypass Through User-Controlled Key

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

3464 vulnerabilities reference this CWE, most recent first.

CVE-2026-5750 (GCVE-0-2026-5750)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:25 – Updated: 2026-04-22 13:59
VLAI
Title
Insecure direct object reference (IDOR) vulnerability in Fullstep
Summary
An insecure direct object reference (IDOR) vulnerability in the Fullstep V5 registration process allows authenticated users to access data belonging to other registered users through various vulnerable authenticated resources in the application. The vulnerable endpoints result from: '/api/suppliers/v1/suppliers//false' to list user information; and '/#/supplier-registration/supplier-registration//2' to update your user information (personal details, documents, etc.).
Severity
7.6 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
Impacted products
Vendor Product Version
Fullstep Fullstep Affected: 5
Unaffected: 5.30.07
Create a notification for this product.
Date Public
2026-04-20 10:00
Credits
Alejandro Rivera León
Show details on NVD website
To clipboard 

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CVE-2026-5730 (GCVE-0-2026-5730)

Vulnerability from cvelistv5 – Published: 2026-07-07 06:45 – Updated: 2026-07-07 13:25
VLAI
Title
IDOR in Idvlabs' Ontime
Summary
Authorization bypass through User-Controlled key vulnerability in Idvlabs Software and Consulting Services Inc. Ontime allows Exploitation of Trusted Identifiers. This issue affects Ontime: through 04052026.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
References
Impacted products
Date Public
2026-07-07 06:39
Credits
Mustafa Soner IŞIK
Show details on NVD website
To clipboard 

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CVE-2026-5652 (GCVE-0-2026-5652)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:33 – Updated: 2026-04-21 17:22
VLAI
Title
Authorization Bypass Through User-Controlled Key in Crafty Controller
Summary
An insecure direct object reference vulnerability in the Users API component of Crafty Controller allows a remote, authenticated attacker to perform user modification actions via improper API permissions validation.
Severity
9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Arcadia Technology, LLC Crafty Controller Affected: 0 , ≤ 4.10.2 (semver)
Create a notification for this product.
Credits
Thank you to [Kacper Leszczyński / szotgan](https://gitlab.com/szotgan) on GitLab for reporting this issue.
Show details on NVD website
To clipboard 

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CVE-2026-5617 (GCVE-0-2026-5617)

Vulnerability from cvelistv5 – Published: 2026-04-15 07:45 – Updated: 2026-04-15 16:13
VLAI
Title
Login as User <= 1.0.3 - Authenticated (Subscriber+) Privilege Escalation via 'oclaup_original_admin' Cookie
Summary
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Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
HA GIA BAO
Show details on NVD website
To clipboard 

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CVE-2026-5523 (GCVE-0-2026-5523)

Vulnerability from cvelistv5 – Published: 2026-07-09 04:32 – Updated: 2026-07-09 12:52
VLAI
Title
Divi Form Builder <= 5.1.8 - Authenticated (Subscriber+) Missing Authorization to Privilege Escalation via User Profile Update Form
Summary
The Divi Form Builder plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 5.1.8. This is due to the update_user() function accepting a user ID parameter from form submissions without verifying that the authenticated user has permission to edit that specific user account, and the handle_register_submission() function only checking if any user is logged in rather than validating permissions for the target user. This makes it possible for authenticated attackers, with subscriber-level access and above, to change the email address and password of any user account, including administrators, resulting in complete account takeover.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
Divi Engine Divi Form Builder Affected: 0 , ≤ 5.1.8 (semver)
Create a notification for this product.
Credits
0xd4rk5id3
Show details on NVD website
To clipboard 

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CVE-2026-5465 (GCVE-0-2026-5465)

Vulnerability from cvelistv5 – Published: 2026-04-07 06:43 – Updated: 2026-04-08 17:12
VLAI
Title
Amelia <= 2.1.3 - Insecure Direct Object Reference to Authenticated (Employee+) Privilege Escalation via 'externalId' Parameter
Summary
The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.1.3. This is due to the `UpdateProviderCommandHandler` failing to validate changes to the `externalId` field when a Provider (Employee) user updates their own profile. The `externalId` maps directly to a WordPress user ID and is passed to `wp_set_password()` and `wp_update_user()` without authorization checks. This makes it possible for authenticated attackers, with Provider-level (Employee) access and above, to take over any WordPress account — including Administrator — by injecting an arbitrary `externalId` value when updating their own provider profile.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
Osvaldo Noe Gonzalez Del Rio
Show details on NVD website
To clipboard 

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CVE-2026-5459 (GCVE-0-2026-5459)

Vulnerability from cvelistv5 – Published: 2026-07-08 12:33 – Updated: 2026-07-08 14:00
VLAI
Title
User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration <= 4.3.1 - Unauthenticated Insecure Direct Object Reference to Arbitrary User Subscription Overwrite
Summary
The User Frontend: AI Powered Frontend Posting, User Directory, Profile, Membership & User Registration plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.3.1 via the payment_page() function due to missing validation on the 'user_id' user controlled key. This makes it possible for unauthenticated attackers to activate a free subscription pack for any user on the site, overwriting their existing paid subscription and causing loss of paid features.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
momopon1415
Show details on NVD website
To clipboard 

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CVE-2026-5396 (GCVE-0-2026-5396)

Vulnerability from cvelistv5 – Published: 2026-05-14 05:30 – Updated: 2026-05-14 10:46
VLAI
Title
Fluent Forms <= 6.1.21 - Authenticated (Subscriber+) Authorization Bypass via 'form_id' Parameter
Summary
The Fluent Forms plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 6.1.21. This is due to the SubmissionPolicy class authorizing submission-level actions (read, modify, delete, add notes) based on a user-supplied `form_id` query parameter. This makes it possible for authenticated attackers, with Fluent Forms Manager access restricted to specific forms, to read, modify status, add notes to, and permanently delete form submissions belonging to any other form by spoofing the form_id parameter to a form they are authorized for.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
Sander Horsman
Show details on NVD website
To clipboard 

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CVE-2026-5395 (GCVE-0-2026-5395)

Vulnerability from cvelistv5 – Published: 2026-05-14 06:44 – Updated: 2026-05-14 10:44
VLAI
Title
Fluent Forms <= 6.2.0 - Authenticated (Subscriber+) Authorization Bypass via 'table' Parameter
Summary
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 6.2.0 via the exportEntries function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Fluent Forms manager-level access and above, to bypass form-level access restrictions to access submissions from forms they are not authorized to view, export data from arbitrary database tables, and enumerate database table names via error message disclosure.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
Sander Horsman
Show details on NVD website
To clipboard 

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    ],
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        }
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CVE-2026-5348 (GCVE-0-2026-5348)

Vulnerability from cvelistv5 – Published: 2026-07-02 05:35 – Updated: 2026-07-02 14:52
VLAI
Title
Academy LMS <= 3.8.1 - Unauthenticated Insecure Direct Object Reference to Private Topic Disclosure
Summary
The Academy LMS – WordPress LMS Plugin for Complete eLearning Solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 3.8.1. This is due to the '/topics' REST API endpoint being registered with a permission callback set to '__return_true', allowing unauthenticated access to course curriculum data without verifying the course's post status or user enrollment. This makes it possible for unauthenticated attackers to access detailed curriculum information for private, draft, scheduled, or password-protected courses by enumerating course IDs.
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 (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
Md. Moniruzzaman Prodhan (NomanProdhan)
Show details on NVD website
To clipboard 

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        },
        "title": "CISA ADP Vulnrichment"
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    ],
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          "type": "finder",
          "value": "Md. Moniruzzaman Prodhan (NomanProdhan)"
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        }
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        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/academy/trunk/includes/api/course.php#L50"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/academy/tags/3.5.3/includes/api/course.php#L50"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/academy/trunk/includes/api/course.php#L77"
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        {
          "url": "https://plugins.trac.wordpress.org/browser/academy/tags/3.5.3/includes/api/course.php#L77"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/academy/trunk/includes/traits/courses.php#L1514"
        },
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          "url": "https://plugins.trac.wordpress.org/browser/academy/tags/3.5.3/includes/traits/courses.php#L1514"
        },
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          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3592849%40academy\u0026new=3592849%40academy\u0026sfp_email=\u0026sfph_mail="
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          "time": "2026-04-01T16:54:17.000Z",
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          "time": "2026-07-01T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Academy LMS \u003c= 3.8.1 - Unauthenticated Insecure Direct Object Reference to Private Topic Disclosure"
    }
  },
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Mitigation
Architecture and Design

For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.

Mitigation
Architecture and Design Implementation

Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.

Mitigation
Architecture and Design

Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.

No CAPEC attack patterns related to this CWE.

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