CVE-2021-48016
9.8, criticalDedeCMS Code Injection Vulnerability
- CVSS
- 9.8, critical critical CVSS v3.1
- EPSS, next 30 days
- n/a
- Exploitation
- No public evidence
- Published
- 22 Oct 2026yesterday
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.
Details
- Vendor
- DedeCMS
- Product
- DedeCMS
- Weakness
- CWE-94 (opens in a new tab)
- Status
- Deferred
- Updated
- 22 Oct 2026
- Assigner
- disclosure@vulncheck.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References 4
Other references 4
- github.com /dedecms/DedeCMS/blob/v5.8.1/include/common.func.php (opens in a new tab)
- github.com /projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/dedecms/dedecms-rce.yaml (opens in a new tab)
- srcincite.io /blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-china.html (opens in a new tab)
- vulncheck.com /advisories/dedecms-5.8.1-beta-unauthenticated-rce-via-plus-flink-php (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2021-48016 in your network?
This page tells you how dangerous CVE-2021-48016 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 23 Oct 2026, not the live upstream state.