Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Cross-Site Scripting (XSS).

This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Wikimedia Foundation Mediawiki - TemplateSandbox Extension unaffected
Version Status Constraints
* affected < 1.46.1, 1.45.5, 1.43.10

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/q/I6630b9915f640bf75c8570165eb8728bd7a2c07a cve-icon cve-icon
https://phabricator.wikimedia.org/T430596 cve-icon cve-icon
History

Fri, 25 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Cross-Site Scripting (XSS). This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Title TemplateSandbox can be abused for XSS by asking another user to preview a page with a certain sandbox prefix
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-25T20:48:53.688Z

Reserved: 2026-09-25T19:28:11.982Z

Link: CVE-2026-100376

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-25T21:17:21.517

Modified: 2026-09-25T21:17:21.517

Link: CVE-2026-100376

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-25T23:00:15Z

Weaknesses