Overview
A critical vulnerability has been discovered in the WooCommerce Product Multi-Action, a popular plugin used by BestWpDeveloper. This vulnerability, identified as CVE-2025-49417, carries a high severity rating due to its potential to enable unauthorized object injection, leading to system compromise or data leakage. Any organization or individual utilizing this plugin, particularly versions through 1.3, is at risk, underscoring the urgent need for mitigation measures.
Vulnerability Summary
CVE ID: CVE-2025-49417
Severity: Critical (9.8 – CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, potential data leakage
Affected Products
Escape the Surveillance Era
Most apps won’t tell you the truth.
They’re part of the problem.
Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.
Ameeba Chat gives you a way out.
- • No phone number
- • No email
- • No personal info
- • Anonymous aliases
- • End-to-end encrypted
Chat without a trace.
Product | Affected Versions
BestWpDeveloper WooCommerce Product Multi-Action | n/a through 1.3
How the Exploit Works
The vulnerability arises from the plugin’s mishandling of data deserialization. Specifically, it fails to properly validate and sanitize user-supplied data before deserializing it. This allows an attacker to inject a malicious serialized object, which, when deserialized, can execute arbitrary code. This could lead to complete system compromise and potential data leakage.
Conceptual Example Code
An attacker could exploit the vulnerability by sending a malicious HTTP request such as the one below:
POST /wp-content/plugins/woocommerce-product-multi-action/vulnerable-endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"malicious_payload": "rO0ABXNyACNvcmcuYXBhY2hlLmNvbW1vbnMuY29sbGVjdGlvbnMuNGs..."
}In this example, “malicious_payload” is a base64-encoded serialized Java object that contains malicious code. When the server deserializes this object, the malicious code is executed.
Recommended Mitigation
The best course of action to mitigate this vulnerability is to apply the vendor-supplied patch. For those unable to immediately apply the patch, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary protection by blocking or alerting on attempts to exploit this vulnerability. However, these are temporary measures and the patch should be applied as soon as possible to fully secure your systems.