{"id":"CVE-2026-30977","state":"PUBLISHED","title":"RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode","description":"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.","publishedAt":"2026-03-10T17:40:38.098Z","updatedAt":"2026-03-11T14:18:37.430Z","severity":{"score":2,"label":"Low","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["lihaohong6 RenderBlocking"],"affected":[{"vendor":"lihaohong6","product":"RenderBlocking","versions":[{"version":"< 0.1.1","status":"affected"}]}],"references":["https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r","https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be","https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/30xxx/CVE-2026-30977.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-30977","state":"PUBLISHED","datePublished":"2026-03-10T17:40:38.098Z","dateUpdated":"2026-03-11T14:18:37.430Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-07T17:53:48.816Z"},"containers":{"cna":{"title":"RenderBlocking has Stored XSS in renderblocking-css with Inline Assets mode","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."}],"affected":[{"vendor":"lihaohong6","product":"RenderBlocking","versions":[{"version":"< 0.1.1","status":"affected"}]}],"references":[{"url":"https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r","name":"https://github.com/lihaohong6/RenderBlocking/security/advisories/GHSA-4h5r-8rjm-496r","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be","name":"https://github.com/lihaohong6/RenderBlocking/commit/096fc47dad9dca153b02cba3db81f412c87fb2be","tags":["x_refsource_MISC"]},{"url":"https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1","name":"https://github.com/lihaohong6/RenderBlocking/releases/tag/v0.1.1","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-10T17:40:38.098Z"},"source":{"advisory":"GHSA-4h5r-8rjm-496r","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-11T14:18:37.430Z"}}]}}}