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.

3255 vulnerabilities reference this CWE, most recent first.

CVE-2026-8347 (GCVE-0-2026-8347)

Vulnerability from cvelistv5 – Published: 2026-05-22 14:06 – Updated: 2026-05-22 17:21
VLAI
Title
Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in Express association Reorder dialog
Summary
Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog.  This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity ordering. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.
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
Concrete CMS Concrete CMS Affected: 5.0 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Winston Crooker
Show details on NVD website

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CVE-2026-8337 (GCVE-0-2026-8337)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:13 – Updated: 2026-05-22 13:13
VLAI
Title
Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys when sites are running concurrent public surveys and private surveys
Summary
Concrete CMS 9.5.0 and below is vulnerable to IDOR in surveys. To be vulnerable, a site would have to be configured in such a way that both public and private surveys are present on the site. An unauthenticated attacker can vote in the restricted survey by submitting the restricted optionID through the public survey’s endpoint. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks  Zer0daySec https://github.com/Zee99y  for reporting
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
  • CWE-565 - Reliance on cookies without validation and integrity checking
Assigner
References
Impacted products
Vendor Product Version
Concrete CMS Concrete CMS Affected: 5.0 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Zer0daySec (GitHub: https://github.com/Zee99y)
Show details on NVD website

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CVE-2026-8204 (GCVE-0-2026-8204)

Vulnerability from cvelistv5 – Published: 2026-05-21 20:56 – Updated: 2026-05-22 12:27
VLAI
Title
Concrete CMS 9.5.0 and below is vulnerable to Authorization Bypass in the Calendar Event Frontend Dialog
Summary
Concrete CMS 9.5.0 and below is vulnerable to authorization Bypass in the Calendar Event Frontend Dialog which can allow cross-calendar data disclosure. A public calendar block can be used as a pivot point to access private calendar data. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 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 Winston Crooker for reporting.
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
Concrete CMS Concrete CMS Affected: 5 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Winston Crooker
Show details on NVD website

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CVE-2026-8196 (GCVE-0-2026-8196)

Vulnerability from cvelistv5 – Published: 2026-05-09 20:15 – Updated: 2026-05-11 16:01
VLAI
Title
JeecgBoot mLogin Endpoint LoginController.java authorization
Summary
A flaw has been found in JeecgBoot 3.9.1. The impacted element is an unknown function of the file jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/system/controller/LoginController.java of the component mLogin Endpoint. This manipulation causes authorization bypass. The attack is possible to be carried out remotely. The attack is considered to have high complexity. The exploitability is regarded as difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a JeecgBoot Affected: 3.9.1
Credits
xpp39 (VulDB User) VulDB CNA Team
Show details on NVD website

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CVE-2026-8027 (GCVE-0-2026-8027)

Vulnerability from cvelistv5 – Published: 2026-05-06 13:45 – Updated: 2026-05-06 15:26
VLAI
Title
FlowiseAI Flowise User Controller authorization
Summary
A weakness has been identified in FlowiseAI Flowise up to 3.0.12. Affected by this vulnerability is an unknown functionality of the component User Controller Handler. This manipulation of the argument userId/organizationId/workspaceId/email causes authorization bypass. The attack may be initiated remotely. The affected component should be upgraded.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/361274 vdb-entrytechnical-description
https://vuldb.com/vuln/361274/cti signaturepermissions-required
https://vuldb.com/submit/777657 third-party-advisory
https://gist.github.com/YLChen-007/3584e6ffa0bba6… related
Impacted products
Vendor Product Version
FlowiseAI Flowise Affected: 3.0.0
Affected: 3.0.1
Affected: 3.0.2
Affected: 3.0.3
Affected: 3.0.4
Affected: 3.0.5
Affected: 3.0.6
Affected: 3.0.7
Affected: 3.0.8
Affected: 3.0.9
Affected: 3.0.10
Affected: 3.0.11
Affected: 3.0.12
    cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Eric-a (VulDB User)
Show details on NVD website

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CVE-2026-7886 (GCVE-0-2026-7886)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:18 – Updated: 2026-05-22 13:12
VLAI
Title
Concrete CMS 9.5.0 and below is vulnerable to IDOR in AddMessage/UpdateMessage via attachments[] parameter
Summary
Concrete CMS 9.5.0 and below is vulnerable to IDOR in AddMessage/UpdateMessage via attachments[] parameter which can lead to file permission bypass. The `AddMessage` and `UpdateMessage` conversation controllers accept user-supplied file attachment IDs and load files directly via `$em->find(File::class, $attachmentID)` without checking per-file permissions (`canViewFile()`). A user who can post in any conversation can reference any file in the CMS file manager by its sequential ID, effectively bypassing the file permission system.  The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with a vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Tristan Mandani for reporting. if a site truly has private files, the owner should set up a private storage location https://documentation.concretecms.org/user-guide/editors-reference/dashboard/system-and-maintenance/files/file-storage-locations outside of the webroot so that permissions can be checked on view as well. That way, even if a authorized user attaches a file, or otherwise links to it, unauthorized users won't be able to view the file.
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
Concrete CMS Concrete CMS Affected: 5.0 , ≤ 9.5.0 (git)
Create a notification for this product.
Credits
Tristan Mandani
Show details on NVD website

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CVE-2026-7881 (GCVE-0-2026-7881)

Vulnerability from cvelistv5 – Published: 2026-05-21 21:09 – Updated: 2026-05-22 13:14
VLAI
Title
Concrete CMS 9.5.0 and below is vulnerable to IDOR in the Express Entry Detail block
Summary
Concrete CMS 9.5.0 and below is subject to Insecure Direct Object Reference (IDOR) in the Express Entry Detail block via the exEntryID parameter. This IDOR leads to unauthorized access to all Express form submissions. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 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 Tristan Madani for reporting.
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
Concrete CMS Concrete CMS Affected: 5.0 , < 9.5.0 (git)
Create a notification for this product.
Credits
Tristan Madani
Show details on NVD website

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CVE-2026-7787 (GCVE-0-2026-7787)

Vulnerability from cvelistv5 – Published: 2026-06-11 14:41 – Updated: 2026-06-11 16:08
VLAI
Title
Unauthenticated Session History Access via Public Flow Execution
Summary
IBM Langflow OSS 1.0.0 through 1.9.1 could allow an authenticated user to read or modify sensitive information by bypassing authentication using insecure direct object references.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
ibm
References
URL Tags
https://www.ibm.com/support/pages/node/7275453 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Langflow OSS Affected: 1.0.0 , ≤ 1.9.1 (semver)
    cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:langflow_oss:1.9.1:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-7782 (GCVE-0-2026-7782)

Vulnerability from cvelistv5 – Published: 2026-05-04 22:30 – Updated: 2026-05-05 14:06
VLAI
Title
CodeCanyon Perfex CRM Tenant Clients.php project authorization
Summary
A vulnerability was detected in CodeCanyon Perfex CRM up to 3.4.1. This affects the function Clients::project of the file application/controllers/Clients.php of the component Tenant Handler. The manipulation of the argument ID results in authorization bypass. The attack may be performed from remote. The exploit is now public and may be used.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/360979 vdb-entrytechnical-description
https://vuldb.com/vuln/360979/cti signaturepermissions-required
https://vuldb.com/submit/807683 third-party-advisory
https://bytium.com/insights/perfex-crm-3-4-1-cros… exploit
Impacted products
Vendor Product Version
CodeCanyon Perfex CRM Affected: 3.4.0
Affected: 3.4.1
Create a notification for this product.
Credits
Jobyer Ahmed (Bytium) suffer (VulDB User) suffer (VulDB User)
Show details on NVD website

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CVE-2026-7702 (GCVE-0-2026-7702)

Vulnerability from cvelistv5 – Published: 2026-05-03 15:45 – Updated: 2026-05-04 13:04
VLAI
Title
toeverything AFFiNE Public Markdown Preview Endpoint :docId allowDocPreview authorization
Summary
A vulnerability was detected in toeverything AFFiNE up to 0.26.3. This issue affects the function allowDocPreview of the file /workspace/:workspaceId/:docId of the component Public Markdown Preview Endpoint. The manipulation results in authorization bypass. It is possible to launch the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/360871 vdb-entrytechnical-description
https://vuldb.com/vuln/360871/cti signaturepermissions-required
https://vuldb.com/submit/804455 third-party-advisory
https://github.com/ngocnn97/security-advisories/b… exploit
Impacted products
Vendor Product Version
toeverything AFFiNE Affected: 0.26.0
Affected: 0.26.1
Affected: 0.26.2
Affected: 0.26.3
    cpe:2.3:a:affine:affine:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
ngocnn97 (VulDB User) VulDB CNA Team
Show details on NVD website

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      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:affine:affine:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Public Markdown Preview Endpoint"
          ],
          "product": "AFFiNE",
          "vendor": "toeverything",
          "versions": [
            {
              "status": "affected",
              "version": "0.26.0"
            },
            {
              "status": "affected",
              "version": "0.26.1"
            },
            {
              "status": "affected",
              "version": "0.26.2"
            },
            {
              "status": "affected",
              "version": "0.26.3"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "ngocnn97 (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was detected in toeverything AFFiNE up to 0.26.3. This issue affects the function allowDocPreview of the file /workspace/:workspaceId/:docId of the component Public Markdown Preview Endpoint. The manipulation results in authorization bypass. It is possible to launch the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "vectorString": "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/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 5,
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "Authorization Bypass",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-03T15:45:10.969Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-360871 | toeverything AFFiNE Public Markdown Preview Endpoint :docId allowDocPreview authorization",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/360871"
        },
        {
          "name": "VDB-360871 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/360871/cti"
        },
        {
          "name": "Submit #804455 | AFFiNE AFFiNE (https://github.com/toeverything/AFFiNE) 0.26.3 Authorization Bypass",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/804455"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/ngocnn97/security-advisories/blob/main/AFFiNE_BAC_PoC.mp4"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-02T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-05-02T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-05-02T22:39:39.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "toeverything AFFiNE Public Markdown Preview Endpoint :docId allowDocPreview authorization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-7702",
    "datePublished": "2026-05-03T15:45:10.969Z",
    "dateReserved": "2026-05-02T20:34:33.828Z",
    "dateUpdated": "2026-05-04T13:04:55.344Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.