{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47733", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-19T22:16:39.503Z", "datePublished": "2026-06-24T20:51:29.245Z", "dateUpdated": "2026-06-24T20:51:29.245Z"}, "containers": {"cna": {"title": "Rocket.Chat: Missing URL protocol sanitization in ImageElement allows javascript: URLs in markdown images", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-vvrf-fq54-q4pr", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-vvrf-fq54-q4pr"}], "affected": [{"vendor": "RocketChat", "product": "Rocket.Chat", "versions": [{"version": "< 8.5.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-24T20:51:29.245Z"}, "descriptions": [{"lang": "en", "value": "Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, the ImageElement component in packages/gazzodown renders user-controlled src values directly into <a href> and <img src> attributes without protocol sanitization. Unlike the analogous LinkSpan component \u2014 which uses sanitizeUrl to block javascript:, data:, and vbscript: protocols \u2014 ImageElement passes the raw URL through unchanged. An authenticated user can post a markdown image with a javascript: URL that, if clicked on an older browser, would execute arbitrary JavaScript in the viewer's session. This vulnerability is fixed in 8.5.0."}], "source": {"advisory": "GHSA-vvrf-fq54-q4pr", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,8.5.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Rocket.Chat", "source": "cna", "vendor": "RocketChat"}, "product": "rocket.chat", "vendor": "rocketchat"}], "created": "2026-06-24T22:45:15.369215+00:00", "updated": "2026-06-25T06:30:16.438066+00:00", "vendors": ["rocketchat", "rocketchat$PRODUCT$rocket.chat"]}