Multiple stored i18n/message-key XSSes in UploadWizard

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-0671
StatePUBLISHED
Assignerwikimedia-foundation
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-08 17:15:50 UTC
Updated2026-10-26 21:10:00 UTC
DescriptionImproper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - UploadWizard extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - UploadWizard extension: 1.45, 1.44, 1.43, 1.39.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Wikimedia Mediawiki-extensions-uploadwizard 1.39 All All All
Application Wikimedia Mediawiki-extensions-uploadwizard 1.43 All All All
Application Wikimedia Mediawiki-extensions-uploadwizard 1.44 All All All
Application Wikimedia Mediawiki-extensions-uploadwizard 1.45 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wikimedia Foundation MediaWiki - UploadWizard Extension affected 1.45 Not specified
CNA Wikimedia Foundation MediaWiki - UploadWizard Extension affected 1.44 Not specified
CNA Wikimedia Foundation MediaWiki - UploadWizard Extension affected 1.43 Not specified
CNA Wikimedia Foundation MediaWiki - UploadWizard Extension affected 1.39 Not specified

References

ReferenceSourceLinkTags
gerrit.wikimedia.org/r/q/I16de2211594ea9a686868ad7789f9879bf981fa1 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc gerrit.wikimedia.org Patch
phabricator.wikimedia.org/T407157 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc phabricator.wikimedia.org Exploit, Issue Tracking, Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: A_smart_kitten (en)

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