CVE-2025-24590 Overview
CVE-2025-24590 is a Missing Authorization vulnerability in the picu WordPress plugin, an online photo proofing gallery extension. The flaw affects all versions up to and including 2.4.0 and stems from incorrectly configured access control security levels [CWE-862]. Unauthenticated attackers can reach protected functionality over the network without user interaction. The issue is tracked in the Patchstack database and results in limited confidentiality impact on affected WordPress sites.
Critical Impact
An unauthenticated remote attacker can bypass access control checks in the picu plugin to access resources that should be restricted, leading to disclosure of protected gallery data.
Affected Products
- picu WordPress plugin versions from n/a through 2.4.0
- WordPress sites using picu for online photo proofing galleries
- All deployments of picu prior to the vendor-supplied fix
Discovery Timeline
- 2025-01-27 - CVE-2025-24590 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-24590
Vulnerability Analysis
The vulnerability is a Broken Access Control issue classified as Missing Authorization [CWE-862]. The picu plugin exposes functionality without verifying that the requester has the appropriate capability or role. Because the access control security levels are configured incorrectly, requests that should be limited to authorized users are processed for anonymous callers.
The attack vector is network-based and requires no privileges or user interaction. Exploitation impacts confidentiality by allowing attackers to reach data or actions gated by the plugin's authorization logic. Integrity and availability are not directly affected by this specific weakness.
Root Cause
The root cause is missing or insufficient authorization checks on plugin endpoints. The plugin relies on access control configuration that does not enforce a capability check such as current_user_can() before serving protected resources. This design gap lets requests bypass intended role separation between administrators, contributors, and clients viewing proofing galleries.
Attack Vector
An attacker sends a crafted HTTP request to a vulnerable picu endpoint on a WordPress site running version 2.4.0 or earlier. No authentication, session, or user interaction is required. The server processes the request as though the caller were authorized and returns data or performs an action that should be restricted. Refer to the Patchstack WordPress Vulnerability Report for endpoint-level technical details.
Detection Methods for CVE-2025-24590
Indicators of Compromise
- Unauthenticated HTTP requests to picu plugin endpoints under /wp-content/plugins/picu/ or picu-related admin-ajax.php actions
- Access log entries showing successful responses to picu endpoints from clients without valid WordPress session cookies
- Unexpected retrieval of gallery data, proofing sets, or client-only resources by anonymous users
Detection Strategies
- Inventory WordPress installations and identify sites running the picu plugin at version 2.4.0 or earlier
- Review web server and WordPress access logs for repeated requests to picu endpoints from a single IP or user agent
- Correlate anomalous request patterns against WordPress authentication events to detect access without a prior login
Monitoring Recommendations
- Enable verbose logging on WordPress and the reverse proxy to capture request paths, parameters, and response codes for plugin routes
- Alert on HTTP 200 responses to picu endpoints when the request lacks an authenticated session cookie
- Track plugin version drift across managed WordPress sites and flag hosts still exposing vulnerable picu builds
How to Mitigate CVE-2025-24590
Immediate Actions Required
- Update the picu plugin to a version later than 2.4.0 once released by the vendor
- Audit user roles and any custom capabilities associated with picu galleries to confirm least privilege
- Restrict access to WordPress admin and plugin endpoints at the web server or WAF layer while patching is planned
Patch Information
At the time of publication, the Patchstack advisory identifies all versions up to and including 2.4.0 as vulnerable. Site owners should monitor the Patchstack WordPress Vulnerability Report and the picu plugin page on WordPress.org for a fixed release, then upgrade all affected sites.
Workarounds
- Deactivate the picu plugin on production sites until a patched version is installed
- Apply WAF rules that block unauthenticated requests to known picu endpoints and AJAX actions
- Place picu-driven proofing galleries behind an authenticated reverse proxy or IP allowlist for client access
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
