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.

3210 vulnerabilities reference this CWE, most recent first.

CVE-2026-40768 (GCVE-0-2026-40768)

Vulnerability from cvelistv5 – Published: 2026-06-17 09:51 – Updated: 2026-06-17 15:28
VLAI
Title
WordPress Salon booking system plugin <= 10.30.24 - Insecure Direct Object References (IDOR) vulnerability
Summary
Unauthenticated Insecure Direct Object References (IDOR) in Salon booking system <= 10.30.24 versions.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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
Vendor Product Version
Dimitri Grassi Salon booking system Affected: n/a , ≤ 10.30.24 (custom)
Create a notification for this product.
Credits
Lubin Regnault | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-40737 (GCVE-0-2026-40737)

Vulnerability from cvelistv5 – Published: 2026-04-15 10:21 – Updated: 2026-04-29 09:52
VLAI
Title
WordPress COMPE plugin <= 1.1.4 - Insecure Direct Object References (IDOR) vulnerability
Summary
Authorization Bypass Through User-Controlled Key vulnerability in VillaTheme COMPE compe-woo-compare-products allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects COMPE: from n/a through <= 1.1.4.
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
Vendor Product Version
VillaTheme COMPE Affected: 0 , ≤ 1.1.4 (custom)
Create a notification for this product.
Date Public
2026-04-15 12:20
Credits
Ali Osman ERBAS (0110m4n) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-40600 (GCVE-0-2026-40600)

Vulnerability from cvelistv5 – Published: 2026-04-30 18:22 – Updated: 2026-04-30 18:51
VLAI
Title
Chartbrew: Incorrect Access Control in project share policy routes via unbound policy_id
Summary
Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. In version 4.9.0, Chartbrew allows authenticated users with access to one project to update or delete a SharePolicy record that belongs to a different project. The affected routes authorize the caller against the project in the URL path, but they never verify that policy_id belongs to that project. This permits cross-project modification of dashboard sharing rules, including visibility, password requirements, allowed parameters, and expiration settings. This issue has been patched in version 5.0.0.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
chartbrew chartbrew Affected: = 4.9.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-40591 (GCVE-0-2026-40591)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:54 – Updated: 2026-04-21 17:46
VLAI
Title
FreeScout: Improper Authorization in Phone Conversation Creation Enables Cross-Mailbox Hidden Customer Modification
Summary
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the phone-conversation creation flow accepts attacker-controlled `customer_id`, `name`, `to_email`, and `phone` values and resolves the target customer in the backend without enforcing mailbox-scoped customer visibility. As a result, a low-privileged agent who can create a phone conversation in Mailbox A can bind the new Mailbox A phone conversation to a hidden customer from Mailbox B and add a new alias email to that hidden customer record by supplying `to_email`. Version 1.8.214 fixes the vulnerability.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-40590 (GCVE-0-2026-40590)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:52 – Updated: 2026-04-21 17:39
VLAI
Title
FreeScout's Customer AJAX Create Modifies Hidden Existing Customer
Summary
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the Change Customer modal exposes a “Create a new customer” flow via POST /customers/ajax with action=create. Under limited visibility, the endpoint drops unique-email validation. If the supplied email already belongs to a hidden customer, Customer::create() reuses that hidden customer object and fills empty profile fields from attacker-controlled input. Version 1.8.214 fixes the vulnerability.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-40589 (GCVE-0-2026-40589)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:50 – Updated: 2026-04-21 20:37
VLAI
Title
FreeScout has Customer Edit Cross-Mailbox Email Takeover
Summary
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.
Severity
7.6 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-40570 (GCVE-0-2026-40570)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:48 – Updated: 2026-04-21 19:11
VLAI
Title
FreeScout's Missing Authorization in load_customer_info Allows Any Authenticated User to Access Full Customer PII
Summary
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, the `load_customer_info` action in `POST /conversation/ajax` returns complete customer profile data to any authenticated user without verifying mailbox access. An attacker only needs a valid email address to retrieve all customer PII. Version 1.8.213 fixes the issue.
Severity
5.7 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-40480 (GCVE-0-2026-40480)

Vulnerability from cvelistv5 – Published: 2026-04-17 23:07 – Updated: 2026-04-20 16:16
VLAI
Title
ChurchCRM has Missing Object-Level Authorization / IDOR in `/api/person/{personId}`
Summary
ChurchCRM is an open-source church management system. In versions prior to 7.2.0, the GET /api/person/{personId} endpoint loads and returns person records without performing object-level authorization checks. Although the legacy PersonView.php page enforces canEditPerson() restrictions, the API layer omits this check. Any authenticated user with only EditSelf privileges can enumerate and read other members' records, exposing sensitive PII including names, addresses, phone numbers, and email addresses. This issue has been fixed in version 7.2.0.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
  • CWE-862 - Missing Authorization
Assigner
References
Impacted products
Vendor Product Version
ChurchCRM CRM Affected: < 7.2.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "url": "https://github.com/ChurchCRM/CRM/pull/8616"
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CVE-2026-40308 (GCVE-0-2026-40308)

Vulnerability from cvelistv5 – Published: 2026-04-16 21:30 – Updated: 2026-04-17 12:32
VLAI
Title
My Calendar: Unauthenticated Information Disclosure (IDOR) via Multisite switch_to_blog
Summary
My Calendar is a WordPress plugin for managing calendar events. In versions 3.7.6 and below, the mc_ajax_mcjs_action AJAX endpoint, registered for unauthenticated users, passes user-supplied arguments through parse_str() without validation, allowing injection of arbitrary parameters including a site value. On WordPress Multisite installations, this enables an unauthenticated attacker to call switch_to_blog() with an arbitrary site ID and extract calendar events from any sub-site on the network, including private or hidden events. On standard Single Site installations, switch_to_blog() does not exist, causing an uncaught PHP fatal error and crashing the worker thread, creating an unauthenticated denial of service vector. This issue has been fixed in version 3.7.7.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
joedolson my-calendar Affected: < 3.7.7
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CVE-2026-40252 (GCVE-0-2026-40252)

Vulnerability from cvelistv5 – Published: 2026-04-10 20:52 – Updated: 2026-04-13 16:14
VLAI
Title
Broken Access Control (IDOR) Leading to Cross-Tenant Application Access in FastGPT
Summary
FastGPT is an AI Agent building platform. Prior to 4.14.10.4, Broken Access Control vulnerability (IDOR/BOLA) allows any authenticated team to access and execute applications belonging to other teams by supplying a foreign appId. While the API correctly validates the team token, it does not verify that the requested application belongs to the authenticated team. This leads to cross-tenant data exposure and unauthorized execution of private AI workflows. This vulnerability is fixed in 4.14.10.4.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-284 - Improper Access Control
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
labring FastGPT Affected: < 4.14.10.4
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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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