Common Weakness Enumeration

CWE-639

Allowed

Authorization Bypass Through User-Controlled Key

Abstraction: Base · Status: Incomplete

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.

5433 vulnerabilities reference this CWE, most recent first.

CVE-2026-18441 (GCVE-0-2026-18441)

Vulnerability from cvelistv5 – Published: 2026-09-17 23:27 – Updated: 2026-09-19 14:21
VLAI
Title
LatePoint - Appointment Booking & Scheduling <= 5.6.9 - Unauthenticated Insecure Direct Object Reference to Sensitive Information Disclosure via 'customer[id]' Parameter
Summary
The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.9 via the set_customer_object due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to enumerate arbitrary customer records and disclose personally identifiable information - including first name, last name, email address, and phone number - by iterating the customer[id] parameter. This issue is exploitable only when the site is configured with customer authentication disabled (guest checkout enabled).
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-19 13:19 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2371 records in the last 180 days details
Impacted products
Credits
Show details on NVD website

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CVE-2026-18439 (GCVE-0-2026-18439)

Vulnerability from cvelistv5 – Published: 2026-09-22 07:41 – Updated: 2026-09-23 18:46
VLAI
Title
Tutor LMS <= 4.0.7 - Authenticated (Custom+) Insecure Direct Object Reference to Arbitrary Quiz Question/Answer Modification and Deletion via 'payload' Parameter
Summary
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 4.0.7 via the tutor_quiz_builder_save AJAX action due to missing validation that nested question_id, answer_id, deleted_question_ids[], and deleted_answer_ids[] values in the submitted payload belong to a quiz/topic/course the requester is authorized to manage. The handler only validates the top-level course_id, topic_id, and (when supplied) payload['ID'], but the nested identifiers are passed straight into $wpdb->update/DELETE statements in QuizBuilder::save_questions(), QuizBuilder::save_question_answers(), and QuizBuilder::handle_delete(). This makes it possible for authenticated attackers, with Instructor-level access and above, to overwrite the content and re-parent arbitrary quiz questions/answers belonging to other instructors or administrators, and to delete arbitrary quiz question and answer rows.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 18:37 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2371 records in the last 180 days details
Impacted products
Show details on NVD website

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CVE-2026-18423 (GCVE-0-2026-18423)

Vulnerability from cvelistv5 – Published: 2026-09-15 19:30 – Updated: 2026-09-15 19:43
VLAI
Title
Concrete CMS 9.0.0 through 9.5.2 is vulnerable to Insecure direct object reference (IDOR) in the Express saved search preset delete and edit dialogs allowing an authenticated user with permission on one Express entity to delete or rename saved search pres
Summary
Concrete CMS 9.0.0 through 9.5.2 is vulnerable to Insecure direct object reference (IDOR) in the Express saved search preset delete and edit dialogs . An authenticated user holding only view permission on a single Express entity could therefore permanently delete, with no undo, or rename saved search presets owned by Express entities for which they had no permission, and a renamed preset name was displayed back to users of the targeted entity, enabling defacement or social engineering. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N. Thanks Yalguun Tumenkhuu ( fg0x0 ) for reporting.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 19:42 UTC
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
ConcreteCMS CNA under the mitre root
CNA scorecard B 84/100 over 111 records in the last 180 days details
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 9.0.0 , ≤ 9.5.2 (git)
Create a notification for this product.
Credits
Show details on NVD website

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CVE-2026-18315 (GCVE-0-2026-18315)

Vulnerability from cvelistv5 – Published: 2026-08-19 18:27 – Updated: 2026-08-21 16:15
VLAI
Title
TrueBooker <= 1.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to Account Takeover to 'truebooker_wp_user_id' Parameter
Summary
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key leading to Account Takeover in all versions up to, and including, 1.2.6. This is due to the admin_user_create_cus AJAX handler lacking any authentication or capability check before passing the attacker-supplied truebooker_wp_user_id parameter directly to wp_update_user. This makes it possible for unauthenticated attackers to overwrite the email address of any WordPress user — including an administrator — and then complete the standard WordPress lost-password flow to fully take over the targeted account.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 16:07 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2371 records in the last 180 days details
Impacted products
Show details on NVD website

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CVE-2026-18275 (GCVE-0-2026-18275)

Vulnerability from cvelistv5 – Published: 2026-08-06 15:11 – Updated: 2026-08-06 15:46
VLAI
Title
Authorization Bypass Through User-Controlled Key in eScriptorium
Summary
Authorization bypass in the process and annotation taxonomy serializers in Scripta eScriptorium through 26.04.1 allows a remote authenticated user to run segmentation and transcription against other users' document parts, overwriting their content, via part primary keys supplied to a many=True related field whose queryset restriction was applied to the ManyRelatedField instead of its child_relation and therefore had no effect
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 15:46 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
GitLab CNA under the mitre root
CNA scorecard B 75/100 over 296 records in the last 180 days details
Impacted products
Vendor Product Version
Scripta eScriptorium Affected: 0 , ≤ 26.4.1 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-18258 (GCVE-0-2026-18258)

Vulnerability from cvelistv5 – Published: 2026-08-06 15:11 – Updated: 2026-08-06 15:45
VLAI
Title
Authorization Bypass Through User-Controlled Key in eScriptorium
Summary
Authorization bypass in the Line, LineTranscription, VirtualCollection, tag and process API endpoints in Scripta/eScriptorium through 26.04.1 allows a remote authenticated user to read, modify and delete other users' transcription content via primary keys supplied in the request body, which are queried against the global model manager instead of the request-scoped queryset
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 15:45 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
GitLab CNA under the mitre root
CNA scorecard B 75/100 over 296 records in the last 180 days details
Impacted products
Vendor Product Version
Scripta eScriptorium Affected: 0 , ≤ 26.4.1 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-18121 (GCVE-0-2026-18121)

Vulnerability from cvelistv5 – Published: 2026-09-10 23:10 – Updated: 2026-09-11 14:33
VLAI
Title
Concrete CMS 9.5.2 and below is vulnerable to an authorization bypass (IDOR) in the Calendar block's frontend event dialog (/ccm/calendar/view_event/{bID}/{occurrence_id}).
Summary
Concrete CMS 9.5.2 and below is vulnerable to an authorization bypass (IDOR) because the frontend calendar lightbox endpoint (/ccm/calendar/view_event/{bID}/{occurrence_id}) does not verify that the caller is permitted to view the calendar that owns the requested event occurrence. The controller loads the occurrence directly from an attacker‑supplied, sequential identifier without confirming that it belongs to the calendar configured on the referenced block. An unauthenticated visitor who can render any public calendar block with lightbox properties enabled could therefore supply an arbitrary occurrence identifier and disclose event metadata — title, date, description, page link, and configured event attributes — from calendars they are not permitted to view. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks riodrwn for reporting.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 14:32 UTC
CWE
  • CWE-862 - Missing Authorization
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
ConcreteCMS CNA under the mitre root
CNA scorecard B 84/100 over 111 records in the last 180 days details
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 5.0.0 , ≤ 9.5.2 (git)
Create a notification for this product.
Credits
Show details on NVD website

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CVE-2026-18028 (GCVE-0-2026-18028)

Vulnerability from cvelistv5 – Published: 2026-07-28 10:39 – Updated: 2026-07-28 12:38
VLAI
Title
Missing authorization check in event quick setup view
Summary
The "quick setup" view presented to users after they first create an event allows to set up the most critical parts of an event in just a few clicks. This view did not properly check that the user has permission to change configuration for the given event. An attacker could use a well-timed request to create products, quotas, set bank transfer configuration, or connect a stripe account to an event they do not have access to.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 12:38 UTC
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
rami.io CNA under the mitre root
CNA scorecard C 75/100 over 25 records in the last 180 days details
References
Impacted products
Vendor Product Version
pretix GmbH pretix Affected: 0 , < 2026.4.6 (python)
Affected: 2026.5.0 , < 2026.5.4 (python)
Affected: 2026.6.0 , < 2026.6.1 (q)
Create a notification for this product.
Show details on NVD website

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CVE-2026-17627 (GCVE-0-2026-17627)

Vulnerability from cvelistv5 – Published: 2026-09-04 16:30 – Updated: 2026-09-04 17:36
VLAI
Title
Langflow is affected by improper authorization due to missing access control on the voice-mode WebSocket endpoint
Summary
IBM Langflow OSS 1.0.0 through 1.10.2 could allow a remote authenticated attacker to obtain sensitive information and inject messages into workflow history due to improper authorization.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 17:36 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1308 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7286294 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Langflow OSS Affected: 1.0.0 , ≤ 1.10.2 (semver)
    cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:langflow_oss:1.10.2:*:*:*:*:*:*:*
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Show details on NVD website

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CVE-2026-17570 (GCVE-0-2026-17570)

Vulnerability from cvelistv5 – Published: 2026-07-27 17:38 – Updated: 2026-07-27 18:33
VLAI
Summary
Improper access control in the PAM password history endpoints in Devolutions Server allows an authenticated low-privileged user to disclose plaintext credential secrets via crafted API requests. This issue affects : * Devolutions Server 2026.2.4.0 through 2026.2.12.0 * Devolutions Server 2026.1.23.0 and earlier
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 18:32 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
DEVOLUTIONS CNA under the mitre root
CNA scorecard E 44/100 over 67 records in the last 180 days details
Impacted products
Vendor Product Version
Devolutions Server Affected: 0 , < 2026.1.24 (custom)
Affected: 2026.2.4.0 , < 2026.2.14 (custom)
Create a notification for this product.
Show details on NVD website

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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.