CVE-2025-48261: MultiVendorX Information Disclosure Flaw

CVE-2025-48261 Overview

CVE-2025-48261 is a Sensitive Data Exposure vulnerability affecting the MultiVendorX WordPress plugin (formerly known as dc-woocommerce-multi-vendor). This vulnerability allows unauthenticated attackers to retrieve embedded sensitive data from the application through improper handling of sensitive information in sent data. The flaw is classified under CWE-201 (Insertion of Sensitive Information Into Sent Data).

Critical Impact

Unauthenticated attackers can extract sensitive information from WordPress sites running vulnerable versions of MultiVendorX, potentially exposing confidential business data, vendor information, or customer details without requiring any authentication.

Affected Products

• MultiVendorX WordPress Plugin versions up to and including 4.2.22
• WordPress sites using the dc-woocommerce-multi-vendor plugin
• WooCommerce multi-vendor marketplace installations utilizing MultiVendorX

Discovery Timeline

• 2025-06-09 - CVE-2025-48261 published to NVD
• 2026-04-29 - Last updated in NVD database

Technical Details for CVE-2025-48261

Vulnerability Analysis

This vulnerability stems from the improper handling of sensitive information within the MultiVendorX plugin's data transmission mechanisms. The plugin fails to adequately filter or protect sensitive data before including it in responses sent to users. This creates a condition where attackers can retrieve confidential information that should have been restricted or sanitized before transmission.

The vulnerability is network-accessible and requires no user interaction or authentication to exploit, making it particularly dangerous for publicly accessible WordPress e-commerce sites. The attack complexity is low, meaning minimal technical sophistication is required to successfully exploit this flaw. While the vulnerability only impacts confidentiality with no direct effect on integrity or availability, the potential for sensitive data exposure in a multi-vendor marketplace context poses significant business risks.

Root Cause

The root cause of CVE-2025-48261 lies in CWE-201: Insertion of Sensitive Information Into Sent Data. The MultiVendorX plugin improperly includes sensitive information in data that is transmitted to users or external systems. This occurs when the application fails to implement proper data filtering, access controls, or sanitization routines before constructing responses that may contain sensitive vendor, transaction, or configuration data.

In multi-vendor marketplace environments, this type of flaw is particularly concerning as it may expose sensitive business relationships, pricing structures, commission details, or personally identifiable information (PII) belonging to vendors or customers.

Attack Vector

The attack vector for this vulnerability is network-based, allowing remote exploitation without requiring local access to the target system. An attacker can exploit this vulnerability by sending crafted requests to a WordPress site running a vulnerable version of MultiVendorX. The attack does not require any privileges (unauthenticated access) and needs no user interaction, making it highly exploitable in real-world scenarios.

Attackers can leverage this vulnerability to extract sensitive embedded data from API responses, AJAX handlers, or other data transmission endpoints within the plugin. The lack of authentication requirements means any internet-connected attacker can attempt exploitation against vulnerable targets.

Detection Methods for CVE-2025-48261

Indicators of Compromise

• Unusual or excessive requests to MultiVendorX plugin endpoints from unknown IP addresses
• Unexpected API calls targeting vendor-related data endpoints without proper authentication
• Log entries showing access to sensitive data endpoints from external sources
• Anomalous traffic patterns indicating automated data extraction attempts

Detection Strategies

• Monitor web server access logs for requests targeting /wp-content/plugins/dc-woocommerce-multi-vendor/ paths
• Implement Web Application Firewall (WAF) rules to detect and block suspicious data extraction attempts
• Deploy SentinelOne Singularity to detect anomalous WordPress plugin behavior and potential data exfiltration
• Review application logs for unusual patterns of data access that may indicate exploitation attempts

Monitoring Recommendations

• Enable detailed logging for WordPress REST API and AJAX endpoints used by MultiVendorX
• Configure alerting for high-volume requests to sensitive plugin endpoints
• Implement network monitoring to detect potential data exfiltration from WordPress installations
• Regularly audit access logs for patterns consistent with automated vulnerability scanning

How to Mitigate CVE-2025-48261

Immediate Actions Required

• Update MultiVendorX plugin to a version higher than 4.2.22 immediately
• Review site logs for any indicators of prior exploitation
• Audit sensitive data that may have been exposed and assess breach notification requirements
• Consider temporarily disabling the MultiVendorX plugin until patching is complete if immediate update is not possible

Patch Information

Site administrators should update the MultiVendorX plugin to the latest available version that addresses this vulnerability. The vulnerability affects all versions from the initial release through version 4.2.22. Consult the Patchstack Vulnerability Report for detailed remediation guidance and the latest security information.

Updates can be applied through the WordPress admin dashboard under Plugins > Installed Plugins > MultiVendorX > Update, or via WP-CLI for command-line management. Always backup your WordPress installation before applying plugin updates.

Workarounds

• Implement WAF rules to restrict access to sensitive MultiVendorX endpoints until patching is complete
• Temporarily disable public access to vendor API endpoints if they are not required for site operation
• Apply IP-based access controls to limit access to WordPress admin and plugin endpoints
• Enable additional authentication layers for sensitive API functionality using security plugins

# WordPress CLI command to update MultiVendorX plugin
wp plugin update dc-woocommerce-multi-vendor --version=latest

# Verify current plugin version
wp plugin list --name=dc-woocommerce-multi-vendor --fields=name,version,status

# Backup WordPress before updating
wp db export backup-before-multivendorx-update.sql