{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71389", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-07-16T12:14:41.769Z", "datePublished": "2026-07-23T21:16:44.870Z", "dateUpdated": "2026-07-23T21:16:44.870Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-23T21:16:44.870Z"}, "datePublic": "2025-12-07T00:00:00.000Z", "title": "Cal.com before 5.9.9 Remote Code Execution via RSC", "descriptions": [{"lang": "en", "value": "Cal.com (calcom/cal.diy) before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundles a version of Next.js whose React Server Components (RSC) request handling deserializes attacker-controlled input. A remote attacker can send a crafted RSC request to the server and cause arbitrary code to be executed during server-side processing, without authentication or user interaction. The flaw derives from the upstream Next.js vulnerability CVE-2025-55182 and is resolved in 5.9.9 by updating the affected dependency."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Control of Generation of Code ('Code Injection')", "cweId": "CWE-94", "type": "CWE"}]}], "affected": [{"vendor": "calcom", "product": "cal.diy", "defaultStatus": "unaffected", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "5.9.9"}, {"version": "5.9.9", "status": "unaffected", "versionType": "semver"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 10, "baseSeverity": "CRITICAL"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 10, "baseSeverity": "CRITICAL"}}], "references": [{"url": "https://github.com/calcom/cal.diy/security/advisories/GHSA-qjx2-5xqp-cpf4", "name": "GitHub Security Advisory (GHSA-qjx2-5xqp-cpf4)", "tags": ["vendor-advisory"]}, {"url": "https://github.com/calcom/cal.diy/pull/25592", "name": "Patch (PR #25592)", "tags": ["issue-tracking"]}, {"url": "https://github.com/advisories/GHSA-9qr9-h5gf-34mp", "name": "Upstream Next.js advisory (CVE-2025-55182)", "tags": ["related"]}, {"name": "VulnCheck Advisory: Cal.com before 5.9.9 Remote Code Execution via RSC", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/cal-com-before-remote-code-execution-via-rsc"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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