{"id":"CVE-2025-71389","state":"PUBLISHED","title":"Cal.com before 5.9.9 Remote Code Execution via RSC","description":"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.","publishedAt":"2026-07-23T21:16:44.870Z","updatedAt":"2026-07-28T01:48:14.200Z","severity":{"score":10,"label":"Critical","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["calcom cal.diy"],"affected":[{"vendor":"calcom","product":"cal.diy","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.9.9","versionType":"semver"},{"version":"5.9.9","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/calcom/cal.diy/security/advisories/GHSA-qjx2-5xqp-cpf4","https://github.com/calcom/cal.diy/pull/25592","https://github.com/advisories/GHSA-9qr9-h5gf-34mp","https://www.vulncheck.com/advisories/cal-com-before-remote-code-execution-via-rsc"],"weaknesses":["CWE-94"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71389.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71389","state":"PUBLISHED","datePublished":"2026-07-23T21:16:44.870Z","dateUpdated":"2026-07-28T01:48:14.200Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-16T12:14:41.769Z"},"containers":{"cna":{"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."}],"affected":[{"vendor":"calcom","product":"cal.diy","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"5.9.9","versionType":"semver"},{"version":"5.9.9","status":"unaffected","versionType":"semver"}]}],"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","patch"]},{"url":"https://github.com/advisories/GHSA-9qr9-h5gf-34mp","name":"Upstream Next.js advisory (CVE-2025-55182)","tags":["related"]},{"url":"https://www.vulncheck.com/advisories/cal-com-before-remote-code-execution-via-rsc","name":"VulnCheck Advisory: Cal.com before 5.9.9 Remote Code Execution via RSC","tags":["third-party-advisory"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-94","lang":"en","description":"Improper Control of Generation of Code ('Code Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-07-28T01:48:14.200Z"},"datePublic":"2025-12-07T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:cal:cal.com:*:*:*:*:*:*:*:*","versionEndExcluding":"5.9.9"}]}]}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-24T22:07:00.836723Z","id":"CVE-2025-71389","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-24T22:07:11.513Z"}}]}}}