CVE-2026-30977

lowpriority · track · 0EPSS 0.005 · 43 %ileDEEU

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.50% (43rd) EPSS

CVSS 2 · low

Is it mine?

15 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

2.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v4.02lowCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:Nsecondary · ENISA EU

v4.02lowCVSS: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:Xsecondary · security-advisories@github.com

v4.00.4lowCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79US

affected products (15)

Products and version ranges known to be affected.

Open Source MediaWiki <1.43.7all versionscert_bundDE
Open Source MediaWiki <1.44.4all versionscert_bundDE
Open Source MediaWiki <1.45.2all versionscert_bundDE
Open Source MediaWiki CampaignEvents Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:campaignevents_extension
Open Source MediaWiki Cargo extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:cargo_extension
Open Source MediaWiki CentralAuth Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:centralauth__extension
Open Source MediaWiki GrowthExperiments Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:growthexperiments_extension
Open Source MediaWiki ProofreadPage Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:proofreadpage_extension
Open Source MediaWiki ReportIncident Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:reportincident__extension
Open Source MediaWiki Score Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:score_extension
Open Source MediaWiki Wikilove Extensionall versionscert_bundDEcpe:/a:mediawiki:mediawiki:wikilove_extension
Open Source MediaWiki< 1.43.7cert_bundDE
Open Source MediaWiki< 1.44.4cert_bundDE
Open Source MediaWiki< 1.45.2cert_bundDE
lihaohong6 RenderBlocking≤ < 0.1.1enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1043MediaWiki Erweiterungen: Mehrere Schwachstellen ermöglichen Cross-Site ScriptingDeutsch2026-04-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in MediaWiki Extensions ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-03-10modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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