CVE-2024-2820: DedeCMS Cross-Site Request Forgery Vulnerability

CVE-2024-2820 Overview

CVE-2024-2820 is a cross-site request forgery (CSRF) vulnerability [CWE-352] in DedeCMS 5.7. The flaw resides in the /src/dede/baidunews.php file and is triggered through manipulation of the filename argument. An unauthenticated attacker can craft a malicious request that, when loaded by an authenticated administrator, performs unintended actions on the affected DedeCMS instance.

The exploit has been publicly disclosed, increasing the risk of opportunistic use against unpatched deployments. According to VulDB, the vendor was contacted about this issue but did not respond.

Critical Impact
Attackers can force authenticated DedeCMS administrators to execute unauthorized actions on baidunews.php, potentially modifying content generation parameters through forged requests.

Affected Products

DedeCMS 5.7
Component: /src/dede/baidunews.php
Deployments exposing the DedeCMS administrator backend to internet-based users

Discovery Timeline

2024-03-22 - CVE-2024-2820 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-2820

Vulnerability Analysis

The vulnerability is a cross-site request forgery weakness in the DedeCMS administrative script baidunews.php. The endpoint accepts a filename parameter without validating that the request originated from a legitimate administrative session. Because DedeCMS does not enforce anti-CSRF tokens on this action, any HTTP request that carries a valid administrator session cookie is treated as authorized.

An attacker can host a page that automatically issues a request to the target DedeCMS instance. When an authenticated administrator visits the attacker-controlled page, the browser attaches the session cookie and executes the forged request. User interaction is required, which is consistent with typical CSRF exploitation.

Exploitation impacts integrity by allowing attacker-controlled filename values to be processed by the baidunews.php handler. Confidentiality and availability are not directly affected based on the reported scope.

Root Cause

The root cause is missing CSRF protection on a state-changing administrative endpoint. DedeCMS baidunews.php does not verify a per-session anti-CSRF token, a Referer/Origin header, or any equivalent request-authenticity control before acting on the supplied filename parameter.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker delivers a crafted link, image tag, or auto-submitting form to an authenticated DedeCMS administrator through phishing, forum posts, or watering-hole content. When the browser loads the malicious content, it submits a request to /src/dede/baidunews.php with an attacker-chosen filename value, and DedeCMS processes it under the administrator's session.

See the VulDB entry #257707 and the public proof-of-concept documentation for reported reproduction details.

Detection Methods for CVE-2024-2820

Indicators of Compromise

Web server access log entries showing requests to /src/dede/baidunews.php with unexpected filename parameter values.
HTTP requests to baidunews.php where the Referer header points to an external, non-administrative domain or is missing entirely.
Administrator sessions issuing baidunews.php requests shortly after visiting external URLs from webmail or chat clients.

Detection Strategies

Deploy a web application firewall (WAF) rule that inspects requests to baidunews.php and blocks those lacking a same-origin Referer or Origin header.
Correlate authentication logs with administrative endpoint activity to flag actions that occur without a corresponding in-console navigation pattern.
Alert on requests to DedeCMS admin scripts where the filename argument contains unusual characters, path components, or values outside the expected allow-list.

Monitoring Recommendations

Enable verbose logging on the DedeCMS admin directory and forward logs to a centralized SIEM for retention and analysis.
Monitor outbound email and instant-messaging channels reaching administrator accounts for URLs that target the DedeCMS backend.
Track filesystem changes under DedeCMS content and template directories to catch downstream effects of unauthorized baidunews.php invocations.

How to Mitigate CVE-2024-2820

Immediate Actions Required

Restrict access to the DedeCMS /dede/ administrative directory to trusted IP ranges or VPN users through web server configuration.
Require administrators to use a dedicated browser profile for DedeCMS management to reduce cross-site attack exposure.
Enforce short session lifetimes and re-authentication for sensitive administrative actions.

Patch Information

No vendor patch is currently referenced in the CVE record. VulDB reports that the DedeCMS maintainer was contacted about this disclosure but did not respond. Organizations should monitor the DedeCMS project for future security updates and apply them once available.

Workarounds

Add a reverse-proxy or WAF rule that rejects requests to /src/dede/baidunews.php when the Origin or Referer header does not match the DedeCMS site.
Set the administrator session cookie with SameSite=Strict to prevent cross-site requests from carrying credentials.
Disable or remove baidunews.php if the Baidu news integration functionality is not required in the deployment.

bash

# Example nginx configuration to block cross-origin requests to baidunews.php
location = /src/dede/baidunews.php {
    valid_referers server_names;
    if ($invalid_referer) {
        return 403;
    }
    # Restrict admin path to trusted network
    allow 10.0.0.0/8;
    deny all;
}