CVE-2026-30977
LOWRenderBlocking < 0.1.1 - Stored Cross-Site Scripting in Inline Assets Mode
Title source: llmDescription
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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r
Patch x_refsource_misc
https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be
Release Notes x_refsource_misc
https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1
Scores
CVSS v4
2.0
EPSS
0.0047
EPSS Percentile
37.5%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (1)
lihaohong6/RenderBlocking
< 0.1.1
Published
Mar 10, 2026
Tracked Since
Mar 11, 2026