{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-48016", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-14T20:25:29.144Z", "datePublished": "2026-10-22T10:57:31.176Z", "dateUpdated": "2026-10-29T02:06:05.908Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-22T10:57:31.176Z" }, "datePublic": "2021-09-30T00:00:00.000Z", "title": "DedeCMS 5.8.1-beta Unauthenticated RCE via plus/flink.php", "descriptions": [ { "lang": "en", "value": "DedeCMS through 5.8.1-beta contains a PHP code injection vulnerability in ShowMsg() where the HTTP Referer header is written into a DedeTemplate string and included. Unauthenticated attackers can send a crafted Referer to /plus/flink.php?dopost=save with an empty validate code to execute arbitrary PHP and system commands. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-14." } ], "tags": [ "x_known-exploited-vulnerability", "unsupported-when-assigned" ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Improper Control of Generation of Code ('Code Injection')", "cweId": "CWE-94", "type": "CWE" } ] } ], "affected": [ { "defaultStatus": "unknown", "vendor": "DedeCMS", "product": "DedeCMS", "versions": [ { "status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "5.8.1-beta" } ], "repo": "https://github.com/dedecms/DedeCMS", "packageURL": "pkg:github/dedecms/DedeCMS" } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:dedecms:dedecms:*:*:*:*:*:*:*:*", "versionEndIncluding": "5.8.1-beta" } ] } ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "CRITICAL", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } } ], "references": [ { "url": "https://srcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.html", "name": "Source Incite Blog", "tags": [ "technical-description", "exploit" ] }, { "url": "https://github.com/dedecms/DedeCMS/blob/v5.8.1/include/common.func.php", "name": "DedeCMS v5.8.1 common.func.php ShowMsg", "tags": [ "technical-description" ] }, { "url": "https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/dedecms/dedecms-rce.yaml", "name": "Nuclei Template", "tags": [ "technical-description" ] }, { "name": "VulnCheck Advisory: DedeCMS 5.8.1-beta Unauthenticated RCE via plus/flink.php", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/dedecms-5.8.1-beta-unauthenticated-rce-via-plus-flink-php" } ], "credits": [ { "lang": "en", "value": "The Shadowserver Foundation", "type": "reporter" } ], "source": { "discovery": "UNKNOWN" }, "x_generator": { "engine": "vulncheck-kclub" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-10-29T02:05:53.563309Z", "id": "CVE-2021-48016", "options": [ { "Exploitation": "poc" }, { "Automatable": "yes" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-29T02:06:05.908Z" } } ] } }