{"id":"CVE-2021-48016","revision":"b2ec2a1324c848e183ebd4a516f1bfa3","records":[{"revision":"b2ec2a1324c848e183ebd4a516f1bfa3","observedAt":"2026-10-29T03:48:01.066+00:00","statement":{"source":"cve-program","id":"CVE-2021-48016","aliases":[],"title":"DedeCMS 5.8.1-beta Unauthenticated RCE via plus/flink.php","description":"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.","state":0,"publishedAt":"2026-10-22T10:57:31.176+00:00","modifiedAt":"2026-10-29T02:06:05.908+00:00","affected":[{"ecosystem":"Vendor product","name":"DedeCMS","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unknown\",\n                    \"vendor\": \"DedeCMS\",\n                    \"product\": \"DedeCMS\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"versionType\": \"custom\",\n                            \"lessThanOrEqual\": \"5.8.1-beta\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/dedecms/DedeCMS\",\n                    \"packageURL\": \"pkg:github/dedecms/DedeCMS\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://srcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.html","https://github.com/dedecms/DedeCMS/blob/v5.8.1/include/common.func.php","https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/dedecms/dedecms-rce.yaml","https://www.vulncheck.com/advisories/dedecms-5.8.1-beta-unauthenticated-rce-via-plus-flink-php"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-48016","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-48016","identifiers":["CVE-2021-48016"]},"retained":false,"historicalAffected":[]}],"coverage":[]}