Critical severity9.8NVD Advisory· Published Oct 22, 2026
CVE-2021-48016
CVE-2021-48016
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.
Affected products
1Patches
Vulnerability mechanics
References
4- github.com/dedecms/DedeCMS/blob/v5.8.1/include/common.func.phpnvd
- github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/dedecms/dedecms-rce.yamlnvd
- srcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.htmlnvd
- www.vulncheck.com/advisories/dedecms-5.8.1-beta-unauthenticated-rce-via-plus-flink-phpnvd
News mentions
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