Description
RenderBlocking is a MediaWiki extension that allows interface administrators to specify render-blocking CSS and JavaScript. Prior to 0.1.1, there is Stored XSS in renderblocking-css with Inline Assets mode. $wgRenderBlockingInlineAssets = true and editsitecss user rights are required. This vulnerability is fixed in 0.1.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| lihaohong6 | RenderBlocking | < 0.1.1 | — |
Advisories 1
- WID-SEC-2026-1043 MediaWiki Erweiterungen: Mehrere Schwachstellen ermöglichen Cross-Site Scripting BSI CERT-Bund (WID) · Apr 9, 2026