CVE-2021-48016 DedeCMS - Command Injection

DedeCMS through 5.8.1-beta contains a command injection caused by unsanitized HTTP Referer header in ShowMsg() function, letting unauthenticated attackers execute arbitrary PHP and system commands remotely, exploit requires crafted Referer header.

CVSS base score 9.8 /10
Critical
CISA KEV
Exploited in the wild
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
22 October 2026
Updated
23 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest version beyond 5.8.1-beta.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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