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.

3217 vulnerabilities reference this CWE, most recent first.

CVE-2026-30231 (GCVE-0-2026-30231)

Vulnerability from cvelistv5 – Published: 2026-03-06 21:10 – Updated: 2026-03-09 20:54
VLAI
Title
Flare: Private File IDOR via raw/direct endpoints
Summary
Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to version 1.7.2, the raw and direct file routes only block unauthenticated users from accessing private files. Any authenticated, non‑owner user who knows the file URL can retrieve the content, which is inconsistent with stricter checks used by other endpoints. This issue has been patched in version 1.7.2.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none 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
FlintSH Flare Affected: < 1.7.2
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CVE-2026-30230 (GCVE-0-2026-30230)

Vulnerability from cvelistv5 – Published: 2026-03-06 21:09 – Updated: 2026-03-09 20:54
VLAI
Title
Flare: Password‑Protected Thumbnail Bypass
Summary
Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to version 1.7.2, the thumbnail endpoint does not validate the password for password‑protected files. It checks ownership/admin for private files but skips password verification, allowing thumbnail access without the password. This issue has been patched in version 1.7.2.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none 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
FlintSH Flare Affected: < 1.7.2
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-29204 (GCVE-0-2026-29204)

Vulnerability from cvelistv5 – Published: 2026-05-12 17:46 – Updated: 2026-05-12 21:57
VLAI
Summary
Insufficient ownership check in `clientarea.php` allows an authenticated client area user to submit requests using another user’s `addonId` without any ownership validation leading to unauthorized access to the victim's account.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Insecure Direct Object Reference (IDOR)
Assigner
References
Impacted products
Vendor Product Version
WebPros WHMCS Affected: 7.4.0 , ≤ 18.12.2 (semver)
Affected: 18.13.0 , < 18.13.3 (semver)
Affected: 9.0.0 , < 9.0.4 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-29200 (GCVE-0-2026-29200)

Vulnerability from cvelistv5 – Published: 2026-05-04 05:42 – Updated: 2026-05-04 19:44
VLAI
Summary
A critical IDOR vulnerability has been discovered in Comet Backup affecting all versions from 20.11.0 to 26.1.1 and 26.2.1. The vulnerability allows a tenant administrator to impersonate any end-user account of other tenants on the same server via a vulnerable API call.
Severity
9.9 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Insecure Direct Object Reference (IDOR)
Assigner
References
Impacted products
Vendor Product Version
WebPros Comet Backup Affected: 20.11.0 , < 26.1.2 (semver)
Affected: 26.2.0 , < 26.2.2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-29189 (GCVE-0-2026-29189)

Vulnerability from cvelistv5 – Published: 2026-03-19 23:05 – Updated: 2026-03-20 14:59
VLAI
Title
SuiteCRM has a REST API V8 IDOR: Missing ACL Checks on User Preferences and Relationship Endpoints
Summary
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to versions 7.15.1 and 8.9.3, the SuiteCRM REST API V8 has missing ACL (Access Control List) checks on several endpoints, allowing authenticated users to access and manipulate data they should not have permission to interact with. Versions 7.15.1 and 8.9.3 patch the issue.
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: 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
SuiteCRM SuiteCRM Affected: < 7.15.1
Affected: >= 8.0.0, < 8.9.3
Create a notification for this product.
Show details on NVD website
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CVE-2026-29071 (GCVE-0-2026-29071)

Vulnerability from cvelistv5 – Published: 2026-03-26 23:54 – Updated: 2026-03-27 20:06
VLAI
Title
Open WebUI's Insecure Direct Object Reference (IDOR) allows access to other users' memories
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, any authenticated user can read other users' private memories via `/api/v1/retrieval/query/collection`. Version 0.8.6 patches the issue.
Severity
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/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
open-webui open-webui Affected: < 0.8.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-29069 (GCVE-0-2026-29069)

Vulnerability from cvelistv5 – Published: 2026-03-04 16:57 – Updated: 2026-03-04 17:31
VLAI
Title
Craft has an unauthenticated activation email trigger with potential user enumeration
Summary
Craft is a content management system (CMS). Prior to 5.9.0-beta.2 and 4.17.0-beta.2, the actionSendActivationEmail() endpoint is accessible to unauthenticated users and does not require a permission check for pending users. An attacker with no prior access can trigger activation emails for any pending user account by knowing or guessing the user ID. If the attacker controls the target user’s email address, they can activate the account and gain access to the system. This vulnerability is fixed in 5.9.0-beta.2 and 4.17.0-beta.2.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA: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
craftcms cms Affected: >= 5.0.0-RC1, < 5.9.0-beta.2
Affected: >= 4.0.0-RC1, < 4.17.0-beta.2
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-29002 (GCVE-0-2026-29002)

Vulnerability from cvelistv5 – Published: 2026-04-10 15:11 – Updated: 2026-07-14 18:39
VLAI
Title
CouchCMS Privilege Escalation via f_k_levels_list Parameter
Summary
CouchCMS contains a privilege escalation vulnerability that allows authenticated Admin-level users to create SuperAdmin accounts by tampering with the f_k_levels_list parameter in user creation requests. Attackers can modify the parameter value from 4 to 10 in the HTTP request body to bypass authorization validation and gain full application control, circumventing restrictions on SuperAdmin account creation and privilege assignment.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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
CouchCMS CouchCMS Affected: 0 , ≤ 2.4.0 (semver)
Create a notification for this product.
Date Public
2026-04-03 00:00
Credits
Piyush Kumar Shukla
Show details on NVD website
To clipboard 

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CVE-2026-28788 (GCVE-0-2026-28788)

Vulnerability from cvelistv5 – Published: 2026-03-26 23:38 – Updated: 2026-03-27 20:08
VLAI
Title
Open WebUI's process_files_batch() endpoint missing ownership check, allows unauthorized file overwrite
Summary
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, any authenticated user can overwrite any file's content by ID through the `POST /api/v1/retrieval/process/files/batch` endpoint. The endpoint performs no ownership check, so a regular user with read access to a shared knowledge base can obtain file UUIDs via `GET /api/v1/knowledge/{id}/files` and then overwrite those files, escalating from read to write. The overwritten content is served to the LLM via RAG, meaning the attacker controls what the model tells other users. Version 0.8.6 patches the issue.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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
Vendor Product Version
open-webui open-webui Affected: < 0.8.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-jjp7-g2jw-wh3j"
        }
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      "title": "Open WebUI\u0027s process_files_batch() endpoint missing ownership check, allows unauthorized file overwrite"
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    "datePublished": "2026-03-26T23:38:20.726Z",
    "dateReserved": "2026-03-03T14:25:19.244Z",
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CVE-2026-28782 (GCVE-0-2026-28782)

Vulnerability from cvelistv5 – Published: 2026-03-04 16:36 – Updated: 2026-03-04 17:35
VLAI
Title
Craft has a Permission Bypass and IDOR in Duplicate Entry Action
Summary
Craft is a content management system (CMS). Prior to 5.9.0-beta.1 and 4.17.0-beta.1, the "Duplicate" entry action does not properly verify if the user has permission to perform this action on the specific target elements. Even with only "View Entries" permission (where the "Duplicate" action is restricted in the UI), a user can bypass this restriction by sending a direct request. Furthermore, this vulnerability allows duplicating other users' entries by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system. This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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
craftcms cms Affected: >= 5.0.0-RC1, < 5.9.0-beta.1
Affected: >= 4.0.0-RC1, < 4.17.0-beta.1
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.

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