CVE-2021-48016
CriticalCVSS 9.8Summary
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 validation code to execute arbitrary PHP and system commands.
Risk Assessment
An unauthenticated attacker can execute arbitrary PHP code and system commands on the server, leading to full system compromise. Exploitation has been observed in the wild.
Recommendation
Update DedeCMS to a version later than 5.8.1-beta and restrict access to /plus/flink.php.
Other vulnerabilities in DedeCMS
See all- CVE-2017-17727High
DedeCMS through 5.6 allows arbitrary file upload and PHP code execution by embedding the PHP code in a .jpg file, which is used in the templet parameter to member/article_edit.php.
- CVE-2026-38615Critical
A command execution vulnerability in DedeCMS V5.7.118 in file_manage_control.php allows an attacker to execute arbitrary commands on the server.
- CVE-2023-34842Critical
Remote Code Execution vulnerability in DedeCMS through version 5.7.109 allows an attacker to execute arbitrary code via a crafted POST request to /dede/tpl.php.
- CVE-2023-37839Critical
DedeCMS v5.7.109 has an arbitrary file upload vulnerability in /dede/file_manage_control.php that allows attackers to execute arbitrary code by uploading a crafted PHP file.
- CVE-2017-17731Critical
DedeCMS through 5.7 is vulnerable to SQL Injection via the $_FILES superglobal in plus/recommend.php.
- CVE-2017-17730Critical
DedeCMS versions up to 5.7 are vulnerable to SQL Injection via the logo parameter in plus/flink_add.php.
- CVE-2014-125131Medium
DedeCMS 5.6 and 5.7 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject script by supplying unsanitized input to the adminDirHand parameter. Attackers can send crafted GET requests to /include/dialog/config.php that close the generated script tag and inject JavaScript, which executes in the victim's browser.
- CVE-2026-94004High
A vulnerability was found in DedeCMS up to 5.7.118 in an unknown function of the file plus/mytag_js.php. Manipulation of the argument aid leads to code injection. The attack can be launched remotely and the exploit has been made public.
- CVE-2026-76800Medium
A flaw has been found in DeDeCMS 3. Affected by this vulnerability is an unknown functionality of the file /include/dialog/select_media_post.php. Executing a manipulation of the argument uploadfile can lead to unrestricted upload. The attack can be executed remotely. The exploit has been published and may be used.
- CVE-2026-76783High
A security vulnerability has been detected in DeDeCMS 53_1_UTF8. This vulnerability affects unknown code of the file /plus/advancedsearch.php. Such manipulation of the argument sql leads to sql injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS