CVE-2026-39935
XSS-via-i18n in localised wiki names
- State
- Published
- Severity
- 6.9 Medium
- Published
- Apr 7, 2026
- Updated
- Apr 8, 2026
- Reserved
- Apr 7, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | wikimedia-foundation |
Weaknesses
- CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
Affected Products
| Product | Versions |
|---|---|
Mediawiki - CampaignEvents ExtensionThe Wikimedia Foundation |
|
References
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