CVE-2025-52769: Flexo Social Gallery CSRF Vulnerability

CVE-2025-52769 Overview

CVE-2025-52769 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the flexo-social-gallery WordPress plugin developed by flexostudio. The flaw impacts all plugin versions up to and including 1.0006. An attacker can craft a malicious web page that, when visited by an authenticated WordPress user, triggers unauthorized state-changing actions on the target site. The vulnerability is categorized under CWE-352 and requires user interaction to succeed. Successful exploitation results in a limited integrity impact without direct disclosure of confidential data or service disruption.

Critical Impact
Attackers can force authenticated WordPress administrators to perform unintended actions in the plugin, modifying site state without consent.

Affected Products

flexostudio flexo-social-gallery plugin for WordPress
All versions from initial release through 1.0006
WordPress sites running the plugin with authenticated administrators

Discovery Timeline

2025-08-14 - CVE-2025-52769 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-52769

Vulnerability Analysis

The flexo-social-gallery plugin exposes one or more state-changing endpoints that do not validate a per-request anti-CSRF token. WordPress provides the wp_nonce_field() and check_admin_referer() primitives to defend against CSRF, but the vulnerable code paths accept authenticated requests based solely on session cookies. An attacker who can lure a logged-in administrator to a malicious page can submit forged POST or GET requests to the plugin's handlers. The browser attaches the victim's authentication cookies automatically, and the plugin processes the request as if the administrator initiated it. The impact is bounded to integrity: attackers can alter plugin configuration or gallery data but cannot directly read confidential information.

Root Cause

The root cause is missing or improperly implemented CSRF token validation in one or more request handlers within the plugin. Without a nonce check bound to the user session, the server cannot distinguish a legitimate administrator action from a cross-origin forged request. This maps directly to CWE-352: Cross-Site Request Forgery.

Attack Vector

Exploitation requires an authenticated WordPress user, typically an administrator, to interact with attacker-controlled content such as a phishing email link or a compromised third-party site. The attacker hosts an HTML page containing an auto-submitting form or image tag that targets the vulnerable plugin endpoint on the victim's WordPress site. When the victim visits the page, the browser issues the request with their session cookies. The attack vector is Network with Low attack complexity, no privileges required by the attacker, and User Interaction required.

No verified proof-of-concept code is available. Refer to the Patchstack WordPress Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-52769

Indicators of Compromise

Unexpected changes to Flexo Social Gallery configuration, galleries, or media items in wp_options or plugin-specific tables
WordPress access logs showing POST requests to plugin endpoints with Referer headers pointing to external, untrusted domains
Administrator sessions performing plugin actions immediately after visiting third-party URLs

Detection Strategies

Audit web server logs for requests to flexo-social-gallery endpoints where the Referer or Origin header does not match the site's own domain
Enable WordPress activity logging plugins to record administrative changes and correlate them with user browsing activity
Compare current plugin settings against a known-good baseline to identify unauthorized modifications

Monitoring Recommendations

Monitor authenticated administrator sessions for state-changing requests lacking valid _wpnonce parameters
Alert on outbound clicks from administrator email accounts to newly registered or low-reputation domains
Track plugin version inventory across managed WordPress instances to identify installations still running 1.0006 or earlier

How to Mitigate CVE-2025-52769

Immediate Actions Required

Update the flexo-social-gallery plugin to a version later than 1.0006 once the vendor releases a patched build
Deactivate and remove the plugin if a fixed release is not yet available and the functionality is not business-critical
Instruct WordPress administrators to log out of the admin panel before browsing untrusted sites or clicking external links

Patch Information

At the time of NVD publication, the vulnerability affects versions up to and including 1.0006. Consult the Patchstack advisory and the plugin's page on the WordPress plugin directory for the latest patched version and release notes.

Workarounds

Deploy a web application firewall rule that blocks requests to plugin endpoints when the Origin or Referer header does not match the site's domain
Restrict WordPress administrator accounts to dedicated browsers or browser profiles used exclusively for site management
Enforce SameSite=Lax or SameSite=Strict cookie attributes on the WordPress authentication cookie to reduce cross-origin request exposure

bash

# Example nginx rule enforcing same-origin Referer for plugin endpoints
location ~* /wp-content/plugins/flexo-social-gallery/ {
    if ($http_referer !~* ^https?://example\.com) {
        return 403;
    }
}