CVE-2026-39564 Overview
CVE-2026-39564 is a Sensitive Data Exposure vulnerability affecting the Sunshine Photo Cart WordPress plugin. This vulnerability stems from the insertion of sensitive information into sent data, which allows attackers to retrieve embedded sensitive data from affected WordPress installations running vulnerable versions of the plugin.
The vulnerability is classified under CWE-201 (Insertion of Sensitive Information Into Sent Data), indicating that the plugin inadvertently includes confidential information in data transmissions that may be accessible to unauthorized parties.
Critical Impact
Attackers can extract sensitive data embedded within plugin responses, potentially exposing customer information, payment details, or other confidential data managed by the photo cart application.
Affected Products
- Sunshine Photo Cart WordPress plugin versions prior to 3.6.2
- WordPress installations utilizing the sunshine-photo-cart plugin
Discovery Timeline
- April 8, 2026 - CVE-2026-39564 published to NVD
- April 8, 2026 - Last updated in NVD database
Technical Details for CVE-2026-39564
Vulnerability Analysis
This vulnerability exists within the Sunshine Photo Cart plugin for WordPress, a plugin designed to help photographers sell photos online. The core issue lies in how the plugin handles and transmits data, where sensitive information is inadvertently included in responses or data structures that are accessible to unauthorized users.
The Insertion of Sensitive Information Into Sent Data weakness (CWE-201) occurs when an application includes sensitive data in outgoing transmissions without proper filtering or protection. In the context of an e-commerce photo cart plugin, this could include customer details, order information, pricing data, or internal system information that should remain protected.
Root Cause
The root cause of CVE-2026-39564 is improper data handling within the Sunshine Photo Cart plugin. The plugin fails to adequately sanitize or filter sensitive information before including it in responses sent to users. This oversight allows data that should be restricted to administrative or authenticated contexts to leak through to unauthorized parties.
WordPress plugins that handle e-commerce functionality often process sensitive customer and transaction data. When such plugins do not implement proper data segregation between what should be publicly accessible versus what should remain private, information disclosure vulnerabilities like this one emerge.
Attack Vector
An attacker can exploit this vulnerability by interacting with the Sunshine Photo Cart plugin's functionality and analyzing the data returned in responses. The attack does not require authentication, making it particularly concerning for public-facing WordPress sites.
The exploitation process typically involves:
- Identifying WordPress sites running the vulnerable Sunshine Photo Cart plugin
- Interacting with plugin endpoints or functionality that return data to users
- Analyzing response data to extract embedded sensitive information
- Aggregating exposed data for further malicious purposes
For detailed technical information about this vulnerability, refer to the Patchstack Vulnerability Report.
Detection Methods for CVE-2026-39564
Indicators of Compromise
- Unusual patterns of requests to Sunshine Photo Cart plugin endpoints
- Evidence of automated scanning or enumeration targeting plugin functionality
- Unexpected data access patterns in WordPress or web server logs
- Signs of data harvesting from photo cart responses
Detection Strategies
- Monitor web server access logs for suspicious patterns targeting /wp-content/plugins/sunshine-photo-cart/ paths
- Implement web application firewall (WAF) rules to detect potential information disclosure attempts
- Review plugin output and AJAX responses for unexpected sensitive data inclusion
- Audit WordPress installations to identify vulnerable plugin versions
Monitoring Recommendations
- Enable detailed WordPress audit logging to track plugin interactions
- Configure real-time alerting for unusual traffic patterns to the affected plugin
- Periodically review response data from the photo cart plugin to ensure no sensitive information leakage
- Monitor for reconnaissance activity targeting WordPress plugin directories
How to Mitigate CVE-2026-39564
Immediate Actions Required
- Update Sunshine Photo Cart plugin to version 3.6.2 or later immediately
- Review server logs for any signs of prior exploitation attempts
- Audit any sensitive data that may have been exposed through the plugin
- Consider temporarily disabling the plugin if immediate update is not possible
Patch Information
The vulnerability has been addressed in Sunshine Photo Cart version 3.6.2. WordPress site administrators should update to this version or later through the WordPress admin panel or by downloading the latest version from the WordPress plugin repository.
For more details about the security fix, consult the Patchstack Vulnerability Report.
Workarounds
- Temporarily disable the Sunshine Photo Cart plugin until the patch can be applied
- Implement WAF rules to filter or block suspicious requests targeting the plugin
- Restrict access to the WordPress site using IP whitelisting if feasible
- Enable additional logging to monitor for exploitation attempts during the mitigation window
# WordPress CLI command to update the plugin
wp plugin update sunshine-photo-cart
# Verify the installed version after update
wp plugin list --name=sunshine-photo-cart --fields=name,version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
