CVE-2026-30977 | THREATINT

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.

PUBLISHED Reserved 2026-03-07 | Published 2026-03-10 | Updated 2026-03-11 | Assigner GitHub_M

LOW: 2.0CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 0.1.1

affected

References

github.com/...ocking/security/advisories/GHSA-4h5r-8rjm-496r

github.com/...ommit/096fc47dad9dca153b02cba3db81f412c87fb2be

github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1

cve.org (CVE-2026-30977)

nvd.nist.gov (CVE-2026-30977)

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