CVE-2021-48016

CriticalCVSS 9.8/10Last modified Oct 29, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-94

Affected software

Vendor	Product	Versions
DedeCMS	DedeCMS	<= 5.8.1-beta

References

Timeline

Published: Oct 22, 2026
Last modified: Oct 29, 2026
NVD status: Deferred

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