CheckUser Extension up to 1.39.3 on MediaWiki HTTP Request Header injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in CheckUser Extension up to 1.39.3 on MediaWiki. The affected element is an unknown function of the component HTTP Request Header Handler. Performing a manipulation results in injection. This vulnerability is cataloged as CVE-2023-37255. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in CheckUser Extension up to 1.39.3 on MediaWiki. This affects some unknown functionality of the component HTTP Request Header Handler. The manipulation with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. In Special:CheckUser, a check of the "get edits" type is vulnerable to HTML injection through the User-Agent HTTP request header.

The weakness was shared 06/29/2023. The advisory is shared at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2023-37255 since 06/29/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1055 for this issue.

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-2023-41175). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
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

06/29/2023 🔍
06/29/2023 +0 days 🔍
06/29/2023 +0 days 🔍
01/16/2026 +932 days 🔍

Sourcesinfo

Advisory: phabricator.wikimedia.org
Status: Not defined

CVE: CVE-2023-37255 (🔍)
GCVE (CVE): GCVE-0-2023-37255
GCVE (VulDB): GCVE-100-232689
EUVD: 🔍

Entryinfo

Created: 06/29/2023 20:04
Updated: 01/16/2026 08:17
Changes: 06/29/2023 20:04 (37), 07/21/2023 13:29 (11), 01/16/2026 08:17 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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