CVE-2024-9076: DedeCMS RCE Vulnerability via Command Injection

CVE-2024-9076 Overview

CVE-2024-9076 is an operating system command injection vulnerability in DedeCMS versions up to and including 5.7.115. The flaw resides in unspecified processing logic within the /dede/article_string_mix.php file. Authenticated attackers can manipulate input to inject and execute arbitrary operating system commands on the underlying web server. The issue is tracked under [CWE-77] (Command Injection) and [CWE-78] (OS Command Injection). Public technical details have been disclosed, and the vendor did not respond to disclosure attempts. Exploitation requires network access and administrative-level privileges to the affected endpoint.

Critical Impact
Successful exploitation allows remote command execution on the DedeCMS host, leading to content tampering, data theft, or full server compromise.

Affected Products

DedeCMS versions up to 5.7.115
The vulnerable component: /dede/article_string_mix.php
Deployments where the /dede/ administrative interface is reachable

Discovery Timeline

2024-09-22 - CVE-2024-9076 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-9076

Vulnerability Analysis

The vulnerability affects the DedeCMS administrative backend script article_string_mix.php. This script processes article-related parameters that are passed unsanitized into an operating system command execution context. Attackers with authenticated access to the /dede/ administration path can craft input that breaks out of the intended command context and appends attacker-controlled shell commands.

Exploitation results in arbitrary command execution under the privileges of the PHP process, typically the web server user. Consequences include webshell deployment, credential theft from configuration files, and lateral movement into the hosting environment. Public disclosure of exploit details on Gitee increases the likelihood of opportunistic scanning against exposed DedeCMS installations.

Root Cause

The root cause is improper neutralization of special elements used in an OS command. Input passed through article_string_mix.php reaches a shell execution primitive without sufficient escaping, allowlisting, or use of parameterized process invocation APIs. The absence of vendor response means no upstream patch is documented.

Attack Vector

The attack vector is network-based against the DedeCMS administrative interface. An attacker must hold high-privilege credentials on the target application. Once authenticated, the attacker submits a crafted HTTP request to /dede/article_string_mix.php containing shell metacharacters within a targeted parameter. No user interaction is required beyond attacker actions.

The vulnerability is described in the Gitee RCE Vulnerability Report and cataloged in VulDB #278243. No verified proof-of-concept code is reproduced here; refer to the linked advisories for technical specifics.

Detection Methods for CVE-2024-9076

Indicators of Compromise

HTTP requests to /dede/article_string_mix.php containing shell metacharacters such as ;, |, &, backticks, or $(...) within POST or GET parameters.
Unexpected child processes spawned by the PHP-FPM or web server process, particularly sh, bash, cmd.exe, curl, wget, or powershell.
New or modified PHP files inside the DedeCMS webroot, especially outside standard upload directories.
Outbound network connections from the web server to unknown IPs shortly after administrative HTTP requests.

Detection Strategies

Deploy web application firewall rules that flag command injection payloads targeting the /dede/ administrative path.
Monitor authentication logs for successful admin logins from anomalous geolocations or IP addresses preceding requests to article_string_mix.php.
Correlate web access logs with endpoint process telemetry to detect web server processes spawning shells or download utilities.

Monitoring Recommendations

Enable verbose HTTP request logging on the DedeCMS host and forward logs to a centralized SIEM for retention and correlation.
Alert on file integrity changes within the DedeCMS webroot, particularly .php file creation or modification.
Baseline outbound network activity from the web tier and alert on new destinations after admin panel activity.

How to Mitigate CVE-2024-9076

Immediate Actions Required

Restrict access to the /dede/ administrative directory using IP allowlisting, VPN, or reverse-proxy authentication.
Rotate all DedeCMS administrator credentials and enforce strong, unique passwords with multi-factor authentication where possible.
Audit the webroot for unauthorized .php files and review web access logs for prior exploitation attempts against article_string_mix.php.
Isolate DedeCMS instances from sensitive internal networks pending remediation.

Patch Information

No vendor patch has been published. The vendor did not respond to disclosure attempts according to the VulDB CTI ID #278243 entry. Organizations running DedeCMS should evaluate migration to an actively maintained content management platform. If continued use is required, apply the workarounds below and monitor the VulDB Submission #407461 page for updates.

Workarounds

Remove or rename /dede/article_string_mix.php if the associated feature is not required by editorial workflows.
Place the /dede/ administrative path behind a reverse proxy that enforces network-level authentication and blocks shell metacharacters in parameters.
Run the PHP process under a low-privileged account with restricted filesystem write permissions and no outbound internet access.
Disable PHP functions such as exec, shell_exec, system, passthru, and popen in php.ini via the disable_functions directive where feasible.

bash

# php.ini hardening example
disable_functions = exec,shell_exec,system,passthru,popen,proc_open,pcntl_exec