CVE-2024-13359

The vulnerability present in the Product Input Fields for WooCommerce plugin for WordPress stems from inadequate validation of file types during the execution of the add_product_input_fields_to_order_item_meta() function. This flaw allows for arbitrary file uploads, which can be exploited by attackers to upload malicious files to the server hosting the affected site. The core of the issue lies in the plugin's failure to properly restrict the types of files that can be uploaded, particularly when the accepted file extensions field is left blank by an administrator. Under normal circumstances, the plugin is primarily vulnerable to double extension file upload attacks, where an attacker might upload a file with a misleading extension that could bypass basic security checks.

Exploitation of this vulnerability can occur through various attack vectors. An unauthenticated attacker could leverage the arbitrary file upload capability to introduce malicious scripts or executables onto the server. For instance, if an attacker uploads a PHP file disguised as an image (e.g., image.jpg.php), they could execute arbitrary code on the server once the file is accessed. This could lead to a complete compromise of the web application, allowing the attacker to gain unauthorized access to sensitive data, manipulate site content, or even pivot to other systems within the network. The risk is exacerbated when administrators neglect to configure the plugin correctly, as leaving the accepted file extensions field blank can enable the upload of potentially harmful files without any restrictions.

The real-world impact of this vulnerability can be severe for businesses relying on the WooCommerce platform for their e-commerce operations. Successful exploitation could lead to data breaches, loss of customer trust, and significant financial repercussions. For instance, if an attacker gains access to customer data, including payment information, it could result in regulatory fines and legal liabilities, not to mention the potential for reputational damage. Furthermore, the ability to execute arbitrary code on the server could allow attackers to deploy ransomware or other forms of malware, leading to operational disruptions and additional recovery costs.

To detect and mitigate the risks associated with this vulnerability, organizations should implement several strategies. Regular security audits and vulnerability assessments can help identify misconfigurations and outdated plugins. It is crucial to keep the Product Input Fields for WooCommerce plugin updated to the latest version, as the vendor has released patches to address this vulnerability. Additionally, employing a web application firewall (WAF) can provide an additional layer of security by filtering out malicious requests before they reach the application. Administrators should also enforce strict file type validation and ensure that the accepted file extensions field is properly configured to prevent unauthorized uploads.

In conclusion, the arbitrary file upload vulnerability in the Product Input Fields for WooCommerce plugin poses a significant threat to WordPress-based e-commerce sites. The potential for remote code execution and the associated risks highlight the importance of proper security practices, including regular updates, configuration management, and proactive monitoring. By understanding the technical details, potential attack vectors, and implementing robust detection and mitigation strategies, organizations can better protect themselves against this and similar vulnerabilities in the future.

Recent updates to the CVSS scoring for CVE-2024-13359 reflect a recalibration of the vulnerability’s severity from critical to high, lowering the score from 9.8 to 8.1. This adjustment aligns with refined assessments of the exploitability and impact factors, particularly considering the default limitation to double extension file uploads which constrains the attack surface. Concurrently, CSURFACE threat intelligence has detected a modest but consistent increase in the Exploit Prediction Scoring System (EPSS) value, now at 0.0308, indicating a slight uptick in the likelihood of exploitation attempts in the wild. While no new exploit techniques or proof-of-concept code have been observed, this gradual rise in EPSS suggests growing interest or reconnaissance activity targeting this vulnerability. For defenders, this means that although the immediate risk of widespread exploitation may be somewhat reduced due to the lowered CVSS score, vigilance remains critical given the increasing probability of attack attempts. The updated risk profile underscores a nuanced threat landscape where exploitation potential is moderated by technical constraints but buoyed by emerging attacker focus, necessitating continued monitoring and adaptive defensive postures.

Update 2 — June 13, 2026

The recent adjustment of the CVSS score for CVE-2024-13359 from 8.1 to 9.8 reflects a reassessment of the vulnerability’s criticality, emphasizing its potential impact more sharply. This change is significant because it underscores the heightened risk posed by the arbitrary file upload flaw in the Product Input Fields for WooCommerce plugin, particularly given the possibility of remote code execution through double extension files. Although the EPSS score has decreased notably, indicating a reduced likelihood of immediate widespread exploitation as per our telemetry, the elevated CVSS score signals that the vulnerability remains a high-priority concern for defenders. The divergence between the CVSS and EPSS metrics suggests that while active exploitation attempts have not surged, the technical severity and exploitability potential warrant sustained vigilance. This recalibration should prompt security teams to reassess their exposure and monitoring strategies, as the critical nature of the flaw could facilitate impactful attacks if leveraged by threat actors. No new exploit developments have been detected, but the updated risk profile highlights the necessity for continued observation and preparedness against potential exploitation scenarios.