CVE-2021-48016
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
DedeCMS
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-94Code injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| DedeCMS DedeCMS | v ≤ 5.8.1-beta | — |
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