Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/dedecms/DedeCMS/blob/v5.8.1/include/common.func.php
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilit
- https://srcincite.io/blog/2021/09/30/chasing-a-dream-pwning-the-biggest-cms-in-c
- https://www.vulncheck.com/advisories/dedecms-5.8.1-beta-unauthenticated-rce-via-
FAQ
What is CVE-2021-48016?
CVE-2021-48016 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2021-48016?
CVE-2021-48016 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-48016?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.