Wikimedia Foundation MediaWiki 1.43/1.45/1.46 CommonsMetadata cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.5$0-$5k1.29+

Summaryinfo

A vulnerability identified as problematic has been detected in Wikimedia Foundation MediaWiki 1.43/1.45/1.46. The impacted element is an unknown function of the component CommonsMetadata. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2026-103584. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Wikimedia Foundation MediaWiki 1.43/1.45/1.46. This issue affects some unknown functionality of the component CommonsMetadata. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki CommonsMetadata extension: 1.46, 1.45, and 1.43.

It is possible to read the advisory at phabricator.wikimedia.org. The identification of this vulnerability is CVE-2026-103584 since 10/01/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

It is declared as proof-of-concept.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Proof-of-Concept
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

09/30/2026 VulDB entry created
10/01/2026 +0 days Advisory disclosed
10/01/2026 +0 days CVE reserved
10/01/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: phabricator.wikimedia.org
Status: Not defined

CVE: CVE-2026-103584 (🔒)
GCVE (CVE): GCVE-0-2026-103584
GCVE (VulDB): GCVE-100-412463

Entryinfo

Created: 10/01/2026 00:29
Changes: 10/01/2026 00:29 (72)
Complete: 🔍
Cache ID: 216::103

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