CVE-2021-48016
Critical · 9.8CVSS
9.8
EPSS
0.4%
Published
Oct 22, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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