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.

5459 vulnerabilities reference this CWE, most recent first.

CVE-2026-3999 (GCVE-0-2026-3999)

Vulnerability from cvelistv5 – Published: 2026-03-13 08:38 – Updated: 2026-03-16 11:27
VLAI
Title
Broken access control vulnerability affecting ID Server
Summary
A broken access control may allow an authenticated user to perform a horizontal privilege escalation. The vulnerability only impacts specific configurations.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-13 16:04 UTC
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
ENISA CNA under the ENISA root
CNA scorecard B 80/100 over 53 records in the last 180 days details
References
Impacted products
Vendor Product Version
Pointsharp ID Server Affected: 0 , < 9.0.0 (semver)
Create a notification for this product.
Credits
Reema AlQahtani, Haboob Cybersecurity Services
Show details on NVD website
To clipboard 

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CVE-2026-3688 (GCVE-0-2026-3688)

Vulnerability from cvelistv5 – Published: 2026-07-08 11:35 – Updated: 2026-07-08 15:01
VLAI
Title
WCFM - WooCommerce Multivendor Membership <= 2.11.10 - Insecure Direct Object Reference to Limited Privilege Escalation via User Role Overwrite
Summary
The WCFM Membership – WooCommerce Memberships for Multivendor Marketplace plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.11.10. This is due to the 'wcfmvm_membership_change' AJAX action not validating user permission to modify other users. This makes it possible for authenticated attackers, with vendor level access and above, to change any user's role to 'wcfm_vendor' by changing their membership plan.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 15:00 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2364 records in the last 180 days details
References
Impacted products
Credits
Osvaldo Noe Gonzalez Del Rio (Os)
Show details on NVD website
To clipboard 

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CVE-2026-3568 (GCVE-0-2026-3568)

Vulnerability from cvelistv5 – Published: 2026-04-09 02:25 – Updated: 2026-04-09 12:59
VLAI
Title
MStore API <= 4.18.3 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary User Meta Update
Summary
The MStore API plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.18.3. This is due to the update_user_profile() function in controllers/flutter-user.php processing the 'meta_data' JSON parameter without any allowlist, blocklist, or validation of meta keys. The function reads raw JSON from php://input (line 1012), decodes it (line 1013), authenticates the user via cookie validation (line 1015), and then directly iterates over the user-supplied meta_data array passing arbitrary keys and values to update_user_meta() (line 1080) with no sanitization or restrictions. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify arbitrary user meta fields on their own accounts, including sensitive fields like wp_user_level (to escalate to administrator-level legacy checks), plugin-specific authorization flags (e.g., _wpuf_user_active, aiowps_account_status), and billing/profile fields with unsanitized values (potentially enabling Stored XSS in admin contexts). Note that wp_capabilities cannot be directly exploited this way because it requires a serialized array value, but wp_user_level (a simple integer) and numerous plugin-specific meta keys are exploitable.
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: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 12:59 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2364 records in the last 180 days details
References
Impacted products
Credits
Osvaldo Noe Gonzalez Del Rio
Show details on NVD website
To clipboard 

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CVE-2026-3482 (GCVE-0-2026-3482)

Vulnerability from cvelistv5 – Published: 2026-07-22 18:06 – Updated: 2026-07-23 13:58
VLAI
Title
IBM Sterling B2B Integrator and IBM Sterling File Gateway Authorization Bypass
Summary
IBM Sterling B2B Integrator and IBM Sterling File Gateway 6.2.0.0 through 6.2.0.5_2,  6.2.1.0 through 6.2.1.1_2, and  6.2.2.0 through 6.2.2.0_1 could allow an unauthenticated user to read sensitive information by bypassing authentication through a specially crafted HTTP request.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 13:58 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/7280657 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Sterling B2B Integrator Affected: 6.2.0.0 , ≤ 6.2.0.5_2 (semver)
Affected: 6.2.1.0 , ≤ 6.2.1.1_2 (semver)
Affected: 6.2.2.0 , ≤ 6.2.2.0_1 (semver)
    cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:sterling_b2b_integrator:*:*:*:*:*:*:*:*
Create a notification for this product.
IBM Sterling File Gateway Affected: 6.2.0.0 , ≤ 6.2.0.5_2 (semver)
Affected: 6.2.1.0 , ≤ 6.2.1.1_2 (semver)
Affected: 6.2.2.0 , ≤ 6.2.2.0_1 (semver)
    cpe:2.3:a:ibm:sterling_file_gateway:*:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:sterling_file_gateway:*:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:sterling_file_gateway:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-3473 (GCVE-0-2026-3473)

Vulnerability from cvelistv5 – Published: 2026-05-22 10:27 – Updated: 2026-05-22 12:12
VLAI
Title
Improper file ownership validation in the Boards API allows unauthorised file access
Summary
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boards API requests using valid file IDs.. Mattermost Advisory ID: MMSA-2026-00620
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-22 12:12 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Mattermost CNA under the mitre root
CNA scorecard B 80/100 over 130 records in the last 180 days details
References
URL Tags
https://mattermost.com/security-updates vendor-advisory
Impacted products
Vendor Product Version
Mattermost Mattermost Affected: 11.6.0 , ≤ 11.6.0 (semver)
Affected: 11.5.0 , ≤ 11.5.3 (semver)
Affected: 11.4.0 , ≤ 11.4.4 (semver)
Affected: 10.11.0 , ≤ 10.11.14 (semver)
Unaffected: 11.7.0
Unaffected: 11.6.1
Unaffected: 11.5.4
Unaffected: 11.4.5
Unaffected: 10.11.15
Create a notification for this product.
Credits
eahmed
Show details on NVD website
To clipboard 

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CVE-2026-3454 (GCVE-0-2026-3454)

Vulnerability from cvelistv5 – Published: 2026-05-05 06:43 – Updated: 2026-05-05 12:59
VLAI
Title
GenerateBlocks <= 2.2.0 - Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Exposure via Dynamic Tag Replacements
Summary
The GenerateBlocks plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.2.0. This is due to missing object-level authorization checks in the /wp-json/generateblocks/v1/dynamic-tag-replacements REST endpoint. The endpoint only verifies that the user has the edit_posts capability but does not verify the user has permission to access the specific post or its associated data referenced by attacker-controlled id parameters in dynamic tag content. This makes it possible for authenticated attackers, with Contributor-level access and above, to extract sensitive information from arbitrary posts including author email addresses and non-protected post meta values by crafting dynamic tag payloads such as {{post_meta id:<target>|key:<meta_key>}} and {{post_title id:<target>|link:author_email}}.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-05 12:58 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2364 records in the last 180 days details
References
Impacted products
Vendor Product Version
edge22 GenerateBlocks Affected: 0 , ≤ 2.2.0 (semver)
Create a notification for this product.
Credits
Supanat Konprom
Show details on NVD website
To clipboard 

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CVE-2026-3453 (GCVE-0-2026-3453)

Vulnerability from cvelistv5 – Published: 2026-03-11 02:22 – Updated: 2026-04-08 17:01
VLAI
Title
ProfilePress <= 4.16.11 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary Subscription Cancellation/Expiration
Summary
The ProfilePress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.16.11. This is due to missing ownership validation on the change_plan_sub_id parameter in the process_checkout() function. The ppress_process_checkout AJAX handler accepts a user-controlled subscription ID intended for plan upgrades, loads the subscription record, and cancels/expires it without verifying the subscription belongs to the requesting user. This makes it possible for authenticated attackers, with Subscriber-level access and above, to cancel and expire any other user's active subscription via the change_plan_sub_id parameter during checkout, causing immediate loss of paid access for victims.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 15:38 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2364 records in the last 180 days details
References
Impacted products
Credits
Supanat Konprom
Show details on NVD website
To clipboard 

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CVE-2026-3371 (GCVE-0-2026-3371)

Vulnerability from cvelistv5 – Published: 2026-04-11 01:25 – Updated: 2026-04-13 15:15
VLAI
Title
Tutor LMS <= 3.9.7 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary Course Content Modification
Summary
The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.9.7. This is due to missing authorization checks in the `save_course_content_order()` private method, which is called unconditionally by the `tutor_update_course_content_order` AJAX handler. While the handler's `content_parent` branch includes a `can_user_manage()` check, the `save_course_content_order()` call processes attacker-supplied `tutor_topics_lessons_sorting` JSON without any ownership or capability verification. This makes it possible for authenticated attackers with Subscriber-level access or above to detach lessons from topics, reorder course content, and reassign lessons between topics in any course, including admin-owned courses, by sending a crafted AJAX request with manipulated topic and lesson IDs.
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: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 15:10 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2364 records in the last 180 days details
References
Impacted products
Credits
Hunter Jensen
Show details on NVD website
To clipboard 

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CVE-2026-3321 (GCVE-0-2026-3321)

Vulnerability from cvelistv5 – Published: 2026-03-30 13:17 – Updated: 2026-03-30 15:32
VLAI
Title
Authorization Bypass in ON24 Q&A chat
Summary
A vulnerability of authorization bypass through user-controlled key in the 'console-survey/api/v1/answer/{EVENTID}/{TIMESTAMP}/' endpoint. Exploiting this vulnerability would allow an unauthenticated attacker to enumerate event IDs and obtain the complete Q&A history. This publicly exposed data may include IDs, private URLs, private messages, internal references, or other sensitive information that should only be exposed to authenticated users. In addition, the leaked content could be exploited to facilitate other malicious activities, such as reconnaissance for lateral movement, exploitation of related systems, or unauthorised access to internal applications referenced in the content of chat messages.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-30 15:32 UTC
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Assigner
INCIBE CNA under the INCIBE root
CNA scorecard B 85/100 over 132 records in the last 180 days details
References
Impacted products
Vendor Product Version
ON24 ON24 Q&A chat Affected: 0 , ≤ * (custom)
    cpe:2.3:a:on24:on24_q_a_chat:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-03-30 10:00
Credits
Samuel de Lucas Maroto
Show details on NVD website
To clipboard 

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CVE-2026-3307 (GCVE-0-2026-3307)

Vulnerability from cvelistv5 – Published: 2026-04-21 22:23 – Updated: 2026-04-22 18:00
VLAI
Title
Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers
Summary
An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the secret scanning push protection delegated bypass reviewer list on another repository by manipulating the owner_id parameter in the request body. Authorization was verified against the repository in the URL, but the action was applied to a different repository specified in the request body. The impact is limited to assigning existing trusted users as bypass reviewers; it does not allow adding arbitrary external users. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7, 3.19.4 and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.
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: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 17:59 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
GitHub_P CNA under the mitre root
CNA scorecard B 84/100 over 23 records in the last 180 days details
References
Impacted products
Vendor Product Version
GitHub Enterprise Server Affected: 3.14.0 , ≤ 3.14.24 (semver)
Affected: 3.15.0 , ≤ 3.15.19 (semver)
Affected: 3.16.0 , ≤ 3.16.15 (semver)
Affected: 3.17.0 , ≤ 3.17.12 (semver)
Affected: 3.18.0 , ≤ 3.18.6 (semver)
Affected: 3.19.0 , ≤ 3.19.3 (semver)
Affected: 3.20 , ≤ 3.20.0 (semver)
Create a notification for this product.
Credits
ahacker1
Show details on NVD website
To clipboard 

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              "status": "affected",
              "version": "3.18.0",
              "versionType": "semver"
            },
            {
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                {
                  "at": "3.19.4",
                  "status": "unaffected"
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              ],
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            {
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                  "at": "3.20.1",
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              ],
              "lessThanOrEqual": "3.20.0",
              "status": "affected",
              "version": "3.20",
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            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "ahacker1"
        }
      ],
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          "lang": "en",
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              "value": "An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed an attacker with admin access on one repository to modify the secret scanning push protection delegated bypass reviewer list on another repository by manipulating the owner_id parameter in the request body. Authorization was verified against the repository in the URL, but the action was applied to a different repository specified in the request body. The impact is limited to assigning existing trusted users as bypass reviewers; it does not allow adding arbitrary external users. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7, 3.19.4 and 3.20.1. This vulnerability was reported via the GitHub Bug Bounty program.\u003cbr\u003e"
            }
          ],
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      ],
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            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
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            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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          "descriptions": [
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              "description": "CWE-639 Authorization Bypass Through User-Controlled Key",
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          ]
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      "providerMetadata": {
        "dateUpdated": "2026-04-21T22:23:25.045Z",
        "orgId": "82327ea3-741d-41e4-88f8-2cf9e791e760",
        "shortName": "GitHub_P"
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      "references": [
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          "url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.25"
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        {
          "url": "https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.20"
        },
        {
          "url": "https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.16"
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          "url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.13"
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          "url": "https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.7"
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          "url": "https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.4"
        },
        {
          "url": "https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.1"
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      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Authorization bypass in GitHub Enterprise Server secret scanning push protection allows cross-repository modification of delegated bypass reviewers",
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  "cveMetadata": {
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    "assignerShortName": "GitHub_P",
    "cveId": "CVE-2026-3307",
    "datePublished": "2026-04-21T22:23:25.045Z",
    "dateReserved": "2026-02-26T21:00:43.352Z",
    "dateUpdated": "2026-04-22T18:00:21.619Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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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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