CheckUser Extension up to 1.39.3 on MediaWiki Error Message access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in CheckUser Extension up to 1.39.3 on MediaWiki. This issue affects some unknown processing of the component Error Message Handler. The manipulation results in access control. This vulnerability is cataloged as CVE-2023-37303. There is no exploit available.

Detailsinfo

A vulnerability was found in CheckUser Extension up to 1.39.3 on MediaWiki. It has been classified as critical. Affected is an unknown function of the component Error Message Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In certain situations, an attempt to block a user fails after a temporary browser hang and a DBQueryDisconnectedError error message.

The weakness was shared 06/30/2023. The advisory is shared for download at gerrit.wikimedia.org. This vulnerability is traded as CVE-2023-37303 since 06/30/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-41207). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/30/2023 🔍
06/30/2023 +0 days 🔍
06/30/2023 +0 days 🔍
01/16/2026 +931 days 🔍

Sourcesinfo

Advisory: gerrit.wikimedia.org
Status: Confirmed

CVE: CVE-2023-37303 (🔍)
GCVE (CVE): GCVE-0-2023-37303
GCVE (VulDB): GCVE-100-232764
EUVD: 🔍

Entryinfo

Created: 06/30/2023 21:11
Updated: 01/16/2026 21:55
Changes: 06/30/2023 21:11 (38), 07/22/2023 09:11 (11), 01/16/2026 21:55 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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