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

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00167.

Exploitation none

Automatable no

Technical Impact partial

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 - Flow Extension unaffected
Version Status Constraints
* affected < 1.46.1, 1.45.5, 1.43.10

No data.

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/q/Ic6149363fe1de2440240fe88aebfd4ae30cea606 cve-icon cve-icon
https://phabricator.wikimedia.org/T432425 cve-icon cve-icon
History

Wed, 30 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 29 Sep 2026 16:30:00 +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 - Flow Extension allows Stored XSS. This issue affects Mediawiki - Flow Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Title Flow colon-separator and flow-guidedtour-optin-welcome-description messages allow stored XSS
Weaknesses CWE-79
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-30T20:11:08.570Z

Reserved: 2026-09-25T16:02:34.842Z

Link: CVE-2026-100238

cve-icon Vulnrichment

Updated: 2026-09-30T18:40:52.322Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T17:17:00.873

Modified: 2026-09-30T21:16:52.980

Link: CVE-2026-100238

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T00:45:07Z

Weaknesses