Common Weakness Enumeration

CWE-639

Weakness 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.

It is likely that an attacker would have to be an authenticated user in the system. However, the authorization process would not properly check the data access operation to ensure that the authenticated user performing the operation has sufficient entitlements to perform the requested data access, hence bypassing any other authorization checks present in the system.

For example, attackers can look at places where user specific data is retrieved (e.g. search screens) and determine whether the key for the item being looked up is controllable externally. The key may be a hidden field in the HTML form field, might be passed as a URL parameter or as an unencrypted cookie variable, then in each of these cases it will be possible to tamper with the key value.

Mapping guidance

This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.

Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Relationships and members
ChildOf: CWE-863 · View CWE-1000
ChildOf: CWE-863 · View CWE-1003
ChildOf: CWE-284 · View CWE-1340
Modes of introduction
Architecture and Design

REALIZATION: This weakness is caused during implementation of an architectural security tactic.

Architecture and Design

Retrieval of a user record occurs in the system based on some key value that is under user control. The key would typically identify a user-related record stored in the system and would be used to lookup that record for presentation to the user.

Implementation

One manifestation of this weakness is when a system uses sequential or otherwise easily-guessable session IDs that would allow one user to easily switch to another user's session and read/modify their data.

Detection methods

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)

Effectiveness: High

Notes

Maintenance

As of CWE 4.20, the relationship between IDOR and BOLA needs to be investigated more closely, including research into how these terms are used in the industry. The CWE team suspects that IDOR can be a part of BOLA, but BOLA expands on the weakness inherent to IDOR in that it is not only about objects that are being directly referenced.

Content history
Submission: Evgeny Lebanidze · Cigital · 2008-01-30 · CWE Draft 8
Contribution: Mateus Godinho Pantoja · 2024-08-09 · CWE 4.20

Suggested corrections to use of IDOR versus BOLA

Modification: CWE Content Team · MITRE · 2008-09-08 · CWE 1.0

updated Common_Consequences, Relationships, Type

Modification: CWE Content Team · MITRE · 2008-10-14 · CWE 1.0.1

updated Description

Modification: CWE Content Team · MITRE · 2009-03-10 · CWE 1.3

updated Relationships

Modification: CWE Content Team · MITRE · 2009-05-27 · CWE 1.4

updated Relationships

Modification: CWE Content Team · MITRE · 2009-10-29 · CWE 1.6

updated Common_Consequences

Modification: CWE Content Team · MITRE · 2010-06-21 · CWE 1.9

updated Relationships

Modification: CWE Content Team · MITRE · 2011-03-29 · CWE 1.12

updated Alternate_Terms, Applicable_Platforms, Description, Name, Potential_Mitigations, Relationships

Modification: CWE Content Team · MITRE · 2011-06-01 · CWE 1.13

updated Common_Consequences, Relationships

Modification: CWE Content Team · MITRE · 2012-05-11 · CWE 2.2

updated Relationships

Modification: CWE Content Team · MITRE · 2013-02-21 · CWE 2.4

updated Alternate_Terms, Common_Consequences

Modification: CWE Content Team · MITRE · 2013-07-17 · CWE 2.5

updated Relationships

Modification: CWE Content Team · MITRE · 2014-07-30 · CWE 2.8

updated Relationships

Modification: CWE Content Team · MITRE · 2017-11-08 · CWE 3.0

updated Description, Enabling_Factors_for_Exploitation, Modes_of_Introduction, Relationships

Modification: CWE Content Team · MITRE · 2018-03-27 · CWE 3.1

updated Relationships

Modification: CWE Content Team · MITRE · 2019-06-20 · CWE 3.3

updated Relationships

Modification: CWE Content Team · MITRE · 2020-02-24 · CWE 4.0

updated Relationships

Modification: CWE Content Team · MITRE · 2020-06-25 · CWE 4.1

updated Alternate_Terms

Modification: CWE Content Team · MITRE · 2020-12-10 · CWE 4.3

updated Relationships

Modification: CWE Content Team · MITRE · 2021-03-15 · CWE 4.4

updated Alternate_Terms

Modification: CWE Content Team · MITRE · 2021-10-28 · CWE 4.6

updated Relationships

Modification: CWE Content Team · MITRE · 2023-04-27 · CWE 4.11

updated Detection_Factors, Relationships

Modification: CWE Content Team · MITRE · 2023-06-29 · CWE 4.12

updated Mapping_Notes

Modification: CWE Content Team · MITRE · 2023-10-26 · CWE 4.13

updated Observed_Examples

Modification: CWE Content Team · MITRE · 2024-02-29 · CWE 4.14

updated Demonstrative_Examples

Modification: CWE Content Team · MITRE · 2025-12-11 · CWE 4.19

updated References, Relationships, Weakness_Ordinalities

Modification: CWE Content Team · MITRE · 2026-04-30 · CWE 4.20

updated Alternate_Terms, Maintenance_Notes, References

Modification: CWE Content Team · MITRE · 2026-10-28 · CWE 5.0

updated Description, Modes_of_Introduction, Time_of_Introduction

5740 vulnerabilities reference this CWE, most recent first.

CVE-2023-6223 (GCVE-0-2023-6223)

Vulnerability from cvelistv5 – Published: 2024-01-11 06:49 – Updated: 2026-04-08 16:41
VLAI
Title
LearnPress <= 4.2.5.7 - Insecure Direct Object Reference to Information Disclosure
Summary
The LearnPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 4.2.5.7 via the /wp-json/lp/v1/profile/course-tab REST API due to missing validation on the 'userID' user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to retrieve the details of another user's course progress.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-08 15:56 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2432 records in the last 180 days details
Impacted products
Show details on NVD website

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CVE-2023-6144 (GCVE-0-2023-6144)

Vulnerability from cvelistv5 – Published: 2023-11-20 23:20 – Updated: 2024-08-02 08:21
VLAI
Title
Dev Blog v1.0 - ATO
Summary
Dev blog v1.0 allows to exploit an account takeover through the "user" cookie. With this, an attacker can access any user's session just by knowing their username.
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
CNA scorecard B 89/100 over 59 records in the last 180 days details
Impacted products
Vendor Product Version
Dev Blog Dev Blog Affected: 1.0
Create a notification for this product.
Date Public
2023-11-20 23:12
Show details on NVD website

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CVE-2023-4934 (GCVE-0-2023-4934)

Vulnerability from cvelistv5 – Published: 2023-09-27 07:35 – Updated: 2026-05-21 07:55
VLAI
Title
IDOR in Usta AYBS
Summary
Authorization Bypass Through User-Controlled Key vulnerability in Usta AYBS allows Authentication Abuse, Authentication Bypass. This issue affects AYBS: before 1.0.3.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-23 20:15 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
TR-CERT CNA under the mitre root
CNA scorecard C 75/100 over 276 records in the last 180 days details
References
Impacted products
Vendor Product Version
Usta AYBS Affected: 0 , < 1.0.3 (custom)
Create a notification for this product.
Date Public
2023-09-27 07:30
Show details on NVD website

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CVE-2023-4587 (GCVE-0-2023-4587)

Vulnerability from cvelistv5 – Published: 2023-09-04 11:23 – Updated: 2024-08-02 07:31 Unsupported When Assigned
VLAI
Title
Insecure direct object reference in ZKTeco ZEM800
Summary
An IDOR vulnerability has been found in ZKTeco ZEM800 product affecting version 6.60. This vulnerability allows a local attacker to obtain registered user backup files or device configuration files over a local network or through a VPN server.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-28 19:31 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
INCIBE CNA under the INCIBE root
CNA scorecard B 85/100 over 153 records in the last 180 days details
Impacted products
Vendor Product Version
ZKTeco ZEM800 Affected: 6.60
Create a notification for this product.
zkteco zem800 Affected: 6.60
    cpe:2.3:h:zkteco:zem800:-:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2023-09-04 10:00
Show details on NVD website

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CVE-2023-4213 (GCVE-0-2023-4213)

Vulnerability from cvelistv5 – Published: 2023-09-13 02:54 – Updated: 2026-04-08 16:59
VLAI
Title
Simplr Registration Form Plus+ <= 2.4.5 - Authenticated (Subscriber+) Insecure Direct Object Reference to Arbitrary User Password Change
Summary
The Simplr Registration Form Plus+ plugin for WordPress is vulnerable to Insecure Direct Object References in versions up to, and including, 2.4.5. This is due to the plugin providing user-controlled access to objects, letting a user bypass authorization and access system resources. This makes it possible for authenticated attackers with subscriber-level permissions or above to change user passwords and potentially take over administrator accounts.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-05 18:35 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2432 records in the last 180 days details
Impacted products
Vendor Product Version
mpvanwinkle77 Simplr Registration Form Plus+ Affected: 0 , ≤ 2.4.5 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2023-4101 (GCVE-0-2023-4101)

Vulnerability from cvelistv5 – Published: 2023-10-03 11:26 – Updated: 2024-09-23 17:06
VLAI
Title
Multiple vulnerabilities in IDM Sistemas QSige
Summary
The QSige login SSO does not have an access control mechanism to verify whether the user requesting a resource has sufficient permissions to do so. As a prerequisite, it is necessary to log into the application.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-23 17:04 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
INCIBE CNA under the INCIBE root
CNA scorecard B 85/100 over 153 records in the last 180 days details
Impacted products
Vendor Product Version
IDM Sistemas QSige QSige Affected: 3.0.0.0
Create a notification for this product.
qsige qsige Affected: 3.0.0.0
    cpe:2.3:a:qsige:qsige:3.0.0.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2023-4099 (GCVE-0-2023-4099)

Vulnerability from cvelistv5 – Published: 2023-10-03 11:06 – Updated: 2024-09-06 14:11
VLAI
Title
Multiple vulnerabilities in IDM Sistemas QSige
Summary
The QSige Monitor application does not have an access control mechanism to verify whether the user requesting a resource has sufficient permissions to do so. As a prerequisite, it is necessary to log into the application.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-06 14:07 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
INCIBE CNA under the INCIBE root
CNA scorecard B 85/100 over 153 records in the last 180 days details
Impacted products
Show details on NVD website

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CVE-2023-3998 (GCVE-0-2023-3998)

Vulnerability from cvelistv5 – Published: 2023-10-20 07:29 – Updated: 2026-04-08 17:11
VLAI
Title
wpDiscuz <= 7.6.3 - Insecure Direct Object Reference to Post Rating Increase/Decrease
Summary
The wpDiscuz plugin for WordPress is vulnerable to unauthorized modification of data due to a missing authorization check on the userRate function in versions up to, and including, 7.6.3. This makes it possible for unauthenticated attackers to increase or decrease the rating of a post.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-05 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 2432 records in the last 180 days details
Impacted products
Vendor Product Version
advancedcoding Comments – wpDiscuz Affected: 0 , ≤ 7.6.3 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2023-3869 (GCVE-0-2023-3869)

Vulnerability from cvelistv5 – Published: 2023-10-20 07:29 – Updated: 2026-04-08 17:16
VLAI
Title
wpDiscuz <= 7.6.3 - Insecure Direct Object Reference to Comment Rating Increase/Decrease
Summary
The wpDiscuz plugin for WordPress is vulnerable to unauthorized modification of data due to a missing authorization check on the voteOnComment function in versions up to, and including, 7.6.3. This makes it possible for unauthenticated attackers to increase or decrease the rating of a comment.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-05 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 2432 records in the last 180 days details
Impacted products
Vendor Product Version
advancedcoding Comments – wpDiscuz Affected: 0 , ≤ 7.6.3 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2023-3700 (GCVE-0-2023-3700)

Vulnerability from cvelistv5 – Published: 2023-07-17 06:16 – Updated: 2024-10-30 14:53
VLAI
Title
Authorization Bypass Through User-Controlled Key in alextselegidis/easyappointments
Summary
Authorization Bypass Through User-Controlled Key in GitHub repository alextselegidis/easyappointments prior to 1.5.0.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-30 14:53 UTC
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
@huntrdev CNA
CNA scorecard – unranked: 0 records in the last 180 days, 10 needed details
Impacted products
Vendor Product Version
alextselegidis alextselegidis/easyappointments Affected: unspecified , < 1.5.0 (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.