{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-58654", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-01T21:54:37.946Z", "datePublished": "2026-07-08T13:49:08.711Z", "dateUpdated": "2026-07-08T13:49:08.711Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-08T13:49:08.711Z"}, "datePublic": "2026-06-22T00:00:00.000Z", "title": "Grav - Arbitrary File Upload via Avatar Endpoint", "descriptions": [{"lang": "en", "value": "The Grav API plugin (getgrav/grav-plugin-api) 1.0.0 contains an unrestricted file upload vulnerability in the avatar upload endpoint (/api/v1/users/user/avatar). The endpoint validates only the client-declared MIME type (getClientMediaType) beginning with 'image/' and does not inspect the actual file content or restrict the resulting extension, allowing an authenticated user to store arbitrary content \u2014 including PHP code, SVG with embedded JavaScript, and polyglot payloads \u2014 under user/accounts/avatars/ with predictable filenames. Direct HTTP access to the stored files is blocked by .htaccess (returns 403), but the files persist on disk and could lead to remote code execution or stored XSS in the presence of a path traversal flaw or server misconfiguration. Fixed in 1.0.1."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Unrestricted Upload of File with Dangerous Type", "cweId": "CWE-434", "type": "CWE"}]}], "affected": [{"vendor": "Grav", "product": "Grav", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "1.0.1"}, {"version": "1.0.1", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.0.1"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/getgrav/grav/security/advisories/GHSA-xc64-vh46-vph6", "name": "GitHub Security Advisory (GHSA-xc64-vh46-vph6)", "tags": ["vendor-advisory"]}, {"name": "VulnCheck Advisory: Grav - Arbitrary File Upload via Avatar Endpoint", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/grav-arbitrary-file-upload-via-avatar-endpoint"}], "credits": [{"lang": "en", "value": "nicl4ssic", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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