CVE-2026-42776 Overview
CVE-2026-42776 is a Missing Authorization vulnerability [CWE-862] affecting the WP Sunshine Sunshine Photo Cart plugin for WordPress. The flaw exists in versions up to and including 3.6.7 and stems from incorrectly configured access control security levels. Authenticated attackers with low privileges can leverage this weakness to access functionality or data that should require higher authorization. The issue impacts the confidentiality, integrity, and availability of affected WordPress sites running the plugin.
Critical Impact
Authenticated users with minimal privileges can bypass access control checks in Sunshine Photo Cart to interact with restricted plugin functionality, putting customer data and storefront integrity at risk.
Affected Products
- WP Sunshine Sunshine Photo Cart plugin for WordPress
- All versions from unspecified initial release through 3.6.7
- WordPress sites running the vulnerable plugin with low-privileged user accounts enabled
Discovery Timeline
- 2026-05-25 - CVE-2026-42776 published to NVD
- 2026-05-26 - Last updated in NVD database
Technical Details for CVE-2026-42776
Vulnerability Analysis
The vulnerability is classified as Missing Authorization under [CWE-862]. The Sunshine Photo Cart plugin exposes one or more actions or endpoints without verifying that the requesting user holds the required role or capability. The advisory from Patchstack describes the issue as broken access control resulting from incorrectly configured security levels.
Exploitation requires network access and an authenticated session with low privileges. No user interaction is required, and the attack complexity is low. A successful request allows the attacker to perform operations restricted to higher-privileged roles within the plugin context.
Root Cause
The root cause is the absence or misapplication of capability checks such as WordPress current_user_can() validation before privileged operations execute. Without these checks, the plugin treats authentication alone as sufficient authorization. Any logged-in user, including subscriber-level accounts, can reach functionality that should be gated by higher roles.
Attack Vector
The attack vector is network-based over HTTP or HTTPS to the affected WordPress instance. An attacker authenticates with any low-privileged WordPress account on the target site. They then issue requests to vulnerable Sunshine Photo Cart endpoints, such as admin-ajax.php actions or REST routes registered by the plugin. The server processes the request without validating user capability, granting access to restricted features.
No verified public proof-of-concept code is available. Refer to the Patchstack WordPress Vulnerability Report for additional technical context.
Detection Methods for CVE-2026-42776
Indicators of Compromise
- Unexpected requests to Sunshine Photo Cart endpoints, including admin-ajax.php actions containing sunshine parameters, originating from subscriber or customer-level accounts.
- Modification of plugin-managed records such as galleries, orders, or customer data by accounts that do not normally hold administrative roles.
- WordPress audit log entries showing low-privileged users performing configuration or data export actions tied to the plugin.
Detection Strategies
- Review WordPress access logs for HTTP POST requests to plugin endpoints correlated with non-administrative session cookies.
- Compare the WordPress user role of the requester against the action invoked, flagging mismatches between role and plugin operation.
- Deploy WordPress security plugins or Web Application Firewall rules that inspect Sunshine Photo Cart action names and validate caller capability.
Monitoring Recommendations
- Centralize WordPress and web server logs and alert on plugin endpoints invoked by subscriber-level accounts.
- Track plugin version inventory across WordPress sites and alert when sunshine-photo-cart is at version 3.6.7 or earlier.
- Monitor for sudden changes to product, gallery, or order records that do not correlate with administrator activity.
How to Mitigate CVE-2026-42776
Immediate Actions Required
- Update Sunshine Photo Cart to a version released after 3.6.7 that addresses CVE-2026-42776 once available from WP Sunshine.
- Audit existing WordPress user accounts and remove unused low-privileged accounts that could be abused for authenticated exploitation.
- Enforce strong password and multi-factor authentication policies for all WordPress users to reduce the risk of account compromise.
Patch Information
Consult the Patchstack WordPress Vulnerability Report for the current patched version and remediation guidance. Apply the fixed release on all WordPress instances running the plugin and verify the version after upgrade.
Workarounds
- Restrict access to the WordPress site via IP allowlisting or VPN where customer-facing access is not required.
- Deploy a Web Application Firewall rule that blocks requests to Sunshine Photo Cart endpoints from sessions whose roles do not match the requested action.
- Temporarily deactivate the Sunshine Photo Cart plugin if a patched version cannot be applied promptly and the functionality is not business-critical.
# Configuration example: identify vulnerable plugin versions via WP-CLI
wp plugin get sunshine-photo-cart --field=version
wp plugin update sunshine-photo-cart
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
