lihaohong6 RenderBlocking up to 0.1.0 wgRenderBlockingInlineAssets cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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2.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in lihaohong6 RenderBlocking up to 0.1.0. Affected by this issue is some unknown functionality. Executing a manipulation of the argument wgRenderBlockingInlineAssets can lead to cross site scripting. This vulnerability appears as CVE-2026-30977. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in lihaohong6 RenderBlocking up to 0.1.0. It has been declared as problematic. This vulnerability affects an unknown function. The manipulation of the argument wgRenderBlockingInlineAssets with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-30977 since 03/07/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 0.1.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 096fc47dad9dca153b02cba3db81f412c87fb2be is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 2.4
VulDB Meta Temp Score: 2.3

VulDB Base Score: 2.4
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: RenderBlocking 0.1.1
Patch: 096fc47dad9dca153b02cba3db81f412c87fb2be

Timelineinfo

03/07/2026 CVE reserved
03/10/2026 +3 days Advisory disclosed
03/10/2026 +0 days VulDB entry created
03/15/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-4h5r-8rjm-496r
Status: Confirmed

CVE: CVE-2026-30977 (🔒)
GCVE (CVE): GCVE-0-2026-30977
GCVE (VulDB): GCVE-100-350098

Entryinfo

Created: 03/10/2026 19:51
Updated: 03/15/2026 22:00
Changes: 03/10/2026 19:51 (71), 03/15/2026 22:00 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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