CVE-2026-30977: LIHAOHONG6 Renderblocking

Low severity, CVSS 2.0. EPSS: 0.5% chance of exploitation in the next 30 days.

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

• LIHAOHONG6 Renderblocking: before 0.1.1 (fixed in 0.1.1)

Published 2026-03-10. Last modified 2026-06-17.