CVE-2025-0841: Aridius XYZ OpenCart RCE Vulnerability

CVE-2025-0841 Overview

CVE-2025-0841 is an insecure deserialization vulnerability in the Aridius XYZ extension for OpenCart, affecting versions up to 20240927. The flaw resides in the loadMore function within the News component. Attackers can manipulate serialized input remotely without authentication or user interaction, triggering unsafe object reconstruction. Public exploit code has been disclosed, increasing the risk of opportunistic abuse against unpatched OpenCart deployments running this extension. The vulnerability is tracked under CWE-20: Improper Input Validation and was disclosed through VulDB submission #485445.

Critical Impact

Remote attackers can submit crafted serialized payloads to the loadMore News function, leading to deserialization-based exploitation of OpenCart storefronts running the Aridius XYZ extension.

Affected Products

• Aridius XYZ extension for OpenCart, versions up to 20240927
• OpenCart storefronts that have installed the affected News module
• Any deployment exposing the loadMore endpoint of the News component to the internet

Discovery Timeline

• 2025-01-29 - CVE-2025-0841 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-0841

Vulnerability Analysis

The vulnerability is an insecure deserialization issue in the loadMore function of the News component shipped with the Aridius XYZ OpenCart extension. The function accepts attacker-controllable input and passes it to a deserialization routine without validating its structure or origin. When PHP reconstructs the object graph, magic methods such as __wakeup, __destruct, or __toString can be invoked on attacker-chosen classes. This behavior maps to CWE-20: Improper Input Validation, as the affected function never enforces a safe type contract on the inbound data.

Root Cause

The root cause is the use of a PHP unserialize-style operation on data sourced from an HTTP request parameter in the News loadMore handler. The extension trusts client-supplied serialized strings and performs no allow-listing of expected classes or signature verification. When OpenCart or other installed extensions expose classes containing dangerous magic-method side effects, an attacker can build a gadget chain that executes during object reconstruction.

Attack Vector

Exploitation is performed over the network against the public OpenCart storefront. The attacker issues an HTTP request to the News loadMore route with a crafted serialized payload in place of the expected parameter. No authentication is required, and no user interaction is needed. Successful exploitation depends on the availability of suitable gadget chains in the running PHP application, which can lead to file writes, command execution, or data tampering depending on the chain used. A public proof of concept has been published in a GitHub Gist hosting the exploit code.

No verified exploit code is reproduced here. Refer to the VulDB advisory #293998 and the published gist for technical details on the payload format and request structure.

Detection Methods for CVE-2025-0841

Indicators of Compromise

• HTTP requests to the OpenCart News loadMore endpoint containing serialized PHP markers such as O:, a:, or s: in parameter values
• Unexpected PHP error log entries referencing unserialize(), __wakeup, or class autoload failures originating from the News component
• New or modified files under the OpenCart system/, catalog/, or image/ directories without a corresponding administrator action
• Outbound network connections from the web server process to unfamiliar hosts shortly after News module traffic

Detection Strategies

• Inspect web server access logs for POST or GET requests to the News component carrying base64 or URL-encoded serialized blobs
• Deploy WAF rules that flag PHP serialization syntax appearing in request parameters bound for the OpenCart catalog routes
• Correlate web request telemetry with PHP-FPM child process behavior to identify abnormal child spawning or shell execution after News requests

Monitoring Recommendations

• Forward OpenCart and PHP-FPM logs to a centralized analytics platform and alert on deserialization error patterns
• Baseline normal traffic to the News loadMore endpoint and alert on payload size or content-type deviations
• Monitor file integrity on the OpenCart document root and extension directories for unauthorized writes

How to Mitigate CVE-2025-0841

Immediate Actions Required

• Upgrade the Aridius XYZ OpenCart extension to a release later than 20240927 as recommended by the advisory
• If no fixed version is available, disable or uninstall the Aridius XYZ News component until a patch is applied
• Restrict access to the News loadMore endpoint at the web server or WAF layer to expected origins and request shapes

Patch Information

The advisory recommends upgrading the affected component. No vendor patch URL is published in the NVD entry. Administrators should consult the VulDB advisory #293998 and the Aridius distribution channel for the corrected release of the XYZ extension.

Workarounds

• Block requests to the News loadMore route that contain serialized PHP indicators using WAF signatures
• Configure PHP with disable_functions to remove dangerous sinks such as system, exec, and passthru where they are not required
• Run OpenCart under a least-privilege user account and apply strict filesystem permissions to limit post-exploitation impact
• Place the storefront behind a reverse proxy that strips or normalizes unexpected parameter encodings before they reach PHP

# Example WAF rule concept (ModSecurity) to flag PHP serialization in News loadMore requests
SecRule REQUEST_URI "@contains route=extension/module/xyz/loadMore" \
  "chain,phase:2,deny,status:403,id:1009841,msg:'Possible CVE-2025-0841 deserialization payload'"
SecRule ARGS "@rx (?:^|[^A-Za-z0-9])(O|a|s):\d+:" "t:none"