CVE-2026-66490

{"id": "CVE-2026-66490", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66490", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-29T14:42:53.533293Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@joomla.org", "affectedData": [{"vendor": "balbooa.com", "product": "Gridbox extension for Joomla", "versions": [{"status": "affected", "version": "1.0.0-2.20.1"}], "packageName": "com_gridbox", "defaultStatus": "unaffected"}]}], "published": "2026-07-29T14:16:34.373", "references": [{"url": "https://mysites.guru/blog/gridbox-23-critical-vulnerabilities/", "tags": ["Third Party Advisory"], "source": "security@joomla.org"}, {"url": "https://www.balbooa.com/gridbox", "tags": ["Product"], "source": "security@joomla.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@joomla.org", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Joomla Extension - balbooa.com - Stored cross-site scripting via a comment avatar in Gridbox < 2.20.2"}], "lastModified": "2026-08-05T17:24:22.993", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:balbooa:gridbox:*:*:*:*:*:joomla\\!:*:*", "vulnerable": true, "matchCriteriaId": "94D01B09-FAE8-4E62-839F-16A6F07B736C", "versionEndExcluding": "2.20.2"}], "operator": "OR"}]}], "sourceIdentifier": "security@joomla.org"}