RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode
Priority LOW 12CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00548 46th percentileScored 2026-11-07
Fix Fixed RenderBlocking (lihaohong6): 0.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| lihaohong6 | RenderBlocking | before 0.1.1 | 0.1.1 | Patch available | CNA |
- RenderBlocking Vendorlihaohong6 Affected before 0.1.1 Fixed in 0.1.1 Patch available CNA
Remediation
- Fix · CNA RenderBlocking (lihaohong6) Fixed in 0.1.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-30977
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences