CVE-2026-30977

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.

Score

CVSS 4.0 2.0 Low

Status

Deferred - security-advisories@github.com

Published

2026-03-10

Last modified

2026-03-11

Weaknesses

CWE-79

Affected products

• Renderblocking (Lihaohong6)

References

• https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be
• https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1
• https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r