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CVE Vulnerability Details :
CVE-2026-39935
PUBLISHED
More InfoOfficial Page
Assigner-wikimedia-foundation
Assigner Org ID-c4f26cc8-17ff-4c99-b5e2-38fc1793eacc
View Known Exploited Vulnerability (KEV) details
Published At-07 Apr, 2026 | 22:04
Updated At-08 Apr, 2026 | 22:06
Rejected At-
▼CVE Numbering Authority (CNA)
XSS-via-i18n in localised wiki names

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CampaignEvents Extension allows Cross-Site Scripting (XSS). This issue was remediated only on the `master` branch.

Affected Products
Vendor
Wikimedia FoundationThe Wikimedia Foundation
Product
Mediawiki - CampaignEvents Extension
Default Status
affected
Versions
Affected
  • 1.43
  • 1.44
  • 1.45
  • From 0 before 1.43 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-63CAPEC-63 Cross-Site Scripting (XSS)
CAPEC ID: CAPEC-63
Description: CAPEC-63 Cross-Site Scripting (XSS)
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Daimona
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://phabricator.wikimedia.org/T418254
N/A
https://gerrit.wikimedia.org/r/c/1249320
N/A
Hyperlink: https://phabricator.wikimedia.org/T418254
Resource: N/A
Hyperlink: https://gerrit.wikimedia.org/r/c/1249320
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found