CVE-2026-30977 LOW

CVE-2026-30977: RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode

Vendor Lihaohong6
Product RenderBlocking
Weakness CWE-79 · XSS
Published March 10, 2026
Last update March 11, 2026
View on NVD All CVEs

CVSS base score

2.0/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction —
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 10, 2026 CVE published
March 11, 2026 Record updated