CVE-2024-8302: Dingfanzu CMS SQL Injection Vulnerability

CVE-2024-8302 Overview

CVE-2024-8302 is a SQL injection vulnerability in dingfanzu CMS, a web application maintained by geeeeeeeek and distributed through continuous delivery with rolling releases. The flaw resides in the /ajax/chpwd.php endpoint, where the username parameter is passed to a backend SQL query without proper sanitization. Remote attackers can manipulate the parameter to inject arbitrary SQL statements. The exploit details have been publicly disclosed, increasing the risk of opportunistic attacks against exposed instances. The vendor was contacted prior to disclosure but did not respond, and no patched release is available.

Critical Impact

Remote attackers with low privileges can inject SQL through the username parameter of /ajax/chpwd.php, exposing database contents and integrity to unauthenticated manipulation.

Affected Products

• geeeeeeeek dingfanzu CMS (all commits up to 29d67d9044f6f93378e6eb6ff92272217ff7225c)
• Rolling-release distributions without fixed version identifiers
• Deployments exposing /ajax/chpwd.php to untrusted networks

Discovery Timeline

• 2024-08-29 - CVE-2024-8302 published to NVD
• 2024-09-19 - Last updated in NVD database

Technical Details for CVE-2024-8302

Vulnerability Analysis

The vulnerability is classified under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command. The chpwd.php script processes a password-change request and incorporates the username HTTP parameter directly into a SQL statement. Because input is concatenated rather than parameterized, attacker-controlled syntax alters the query's logical structure.

Successful exploitation allows extraction of credentials, modification of stored data, and potential authentication bypass against the CMS. The endpoint is reachable over the network and requires only low-level user context, which broadens the attacker pool. Because the project follows rolling releases, defenders cannot pin a vulnerable or fixed version number, complicating inventory and patch verification.

Root Cause

The root cause is the absence of prepared statements or input validation in the chpwd.php handler. User-supplied data in the username field is treated as trusted SQL syntax instead of being bound as a parameter. Standard mitigations such as parameterized queries, allowlists, and ORM bindings are not applied.

Attack Vector

An attacker sends a crafted HTTP request to /ajax/chpwd.php with malicious payload content in the username parameter. The injected SQL executes within the application's database context, allowing read or write operations beyond the intended password-change workflow. No user interaction is required, and the attack can be automated against internet-facing instances. Proof-of-concept details have been published in the GitHub PoC Repository.

Detection Methods for CVE-2024-8302

Indicators of Compromise

• HTTP POST or GET requests to /ajax/chpwd.php containing SQL metacharacters such as ', --, UNION, or SLEEP( in the username parameter.
• Unexpected database errors or stack traces referencing chpwd.php in web server logs.
• Outbound DNS or HTTP callbacks from the database host correlating with chpwd.php requests.
• Newly created or modified administrative accounts in the CMS user table without corresponding admin activity.

Detection Strategies

• Deploy web application firewall (WAF) signatures that flag SQL injection patterns targeting chpwd.php and other /ajax/ endpoints.
• Enable database query logging and alert on anomalous query structures originating from the CMS service account.
• Correlate HTTP access logs with database audit logs to identify injection attempts and downstream query execution.

Monitoring Recommendations

• Continuously monitor the CMS web server access logs for high-entropy values or encoded payloads in the username field.
• Track failed and successful password-change events for volume anomalies indicative of automated probing.
• Forward web and database telemetry to a centralized analytics platform for retrospective hunting across the dingfanzu CMS environment.

How to Mitigate CVE-2024-8302

Immediate Actions Required

• Restrict network access to the dingfanzu CMS administrative interface and the /ajax/chpwd.php endpoint through firewall or reverse proxy controls.
• Deploy WAF rules that block SQL injection payloads targeting the username parameter until a code-level fix is available.
• Audit the CMS database for unauthorized account creation, privilege changes, or password resets that may indicate prior exploitation.
• Rotate credentials for any accounts whose hashes may have been exposed through the vulnerable query path.

Patch Information

No official patch has been published. The vendor did not respond to disclosure outreach, and the rolling-release model means there is no fixed version identifier. Operators must apply source-level fixes themselves by rewriting chpwd.php to use parameterized queries, or migrate away from the affected codebase. Refer to the VulDB CVE Data entry for ongoing tracking.

Workarounds

• Replace concatenated SQL in chpwd.php with prepared statements using PDO or mysqli bound parameters.
• Add server-side input validation that rejects non-alphanumeric characters in the username field before reaching database logic.
• Place the CMS behind authenticated access controls or VPN until source-level remediation is verified.

# Example WAF rule (ModSecurity) blocking SQLi against the vulnerable endpoint
SecRule REQUEST_URI "@streq /ajax/chpwd.php" \
    "id:1008302,phase:2,deny,status:403,\
    chain,msg:'CVE-2024-8302 dingfanzu CMS SQLi attempt'"
    SecRule ARGS:username "@detectSQLi" "t:none,t:urlDecodeUni"