{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-30977", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-07T17:53:48.816Z", "datePublished": "2026-03-10T17:40:38.098Z", "dateUpdated": "2026-03-11T14:18:37.430Z"}, "containers": {"cna": {"title": "RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 2, "baseSeverity": "LOW", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r"}, {"name": "https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be", "tags": ["x_refsource_MISC"], "url": "https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be"}, {"name": "https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1"}], "affected": [{"vendor": "lihaohong6", "product": "RenderBlocking", "versions": [{"version": "< 0.1.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-10T17:40:38.098Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-4h5r-8rjm-496r", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-11T14:18:23.151930Z", "id": "CVE-2026-30977", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-11T14:18:37.430Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "RenderBlocking es una extensi\u00f3n de MediaWiki que permite a los administradores de interfaz especificar CSS y JavaScript de bloqueo de renderizado. Antes de la versi\u00f3n 0.1.1, existe una XSS Almacenada en renderblocking-css con el modo de Activos en L\u00ednea. Se requiere que $wgRenderBlockingInlineAssets = true y los derechos de usuario editsitecss. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.1.1."}], "id": "CVE-2026-30977", "lastModified": "2026-03-11T13:53:20.707", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.0, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-10T18:18:56.370", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be"}, {"source": "security-advisories@github.com", "url": "https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.1.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "RenderBlocking", "source": "cna", "vendor": "lihaohong6"}, "product": "renderblocking", "vendor": "lihaohong6"}], "created": "2026-03-11T11:44:42.556348+00:00", "updated": "2026-03-11T11:44:42.556425+00:00", "vendors": ["lihaohong6", "lihaohong6$PRODUCT$renderblocking"]}