CVE-2025-23842: WordPress Gallery Plugin CSRF Vulnerability

CVE-2025-23842 Overview

CVE-2025-23842 is a Cross-Site Request Forgery (CSRF) vulnerability in the Nilesh Shiragave WordPress Gallery Plugin (wordpress-gallery-plugin). The flaw affects all versions up to and including 1.4. According to Patchstack, the CSRF weakness chains into stored Cross-Site Scripting (XSS), allowing an attacker to persist malicious script content through forged administrative actions. The issue is tracked under CWE-352: Cross-Site Request Forgery. Successful exploitation requires an authenticated user, typically an administrator, to visit an attacker-controlled page while logged into WordPress.

Critical Impact

An attacker can trick an authenticated WordPress administrator into submitting forged requests that inject persistent JavaScript into the site, leading to stored XSS execution in any subsequent visitor's browser.

Affected Products

• Nilesh Shiragave WordPress Gallery Plugin wordpress-gallery-plugin
• All versions from n/a through <= 1.4
• WordPress sites running the vulnerable plugin

Discovery Timeline

• 2025-01-16 - CVE-2025-23842 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-23842

Vulnerability Analysis

The vulnerability stems from missing or improperly validated anti-CSRF tokens (nonces) on state-changing requests in the WordPress Gallery Plugin. WordPress provides the wp_nonce_field() and check_admin_referer() APIs to validate the origin of administrative requests. When a plugin omits these checks, any authenticated session becomes vulnerable to forged submissions originating from external sites.

In this case, the CSRF weakness is chained with insufficient output encoding, producing a CSRF-to-stored-XSS condition. An attacker hosts a malicious HTML page containing an auto-submitting form targeting a plugin endpoint. When an administrator visits the page while logged into WordPress, the browser sends the request with valid session cookies. The plugin processes the request without validating intent and stores the attacker's payload in the database. The stored payload then executes whenever an authenticated user loads the affected administrative or front-end view.

Root Cause

The root cause is the absence of CSRF token verification on sensitive plugin actions combined with missing input sanitization and output escaping. WordPress security guidance requires nonce checks for any action that modifies state, paired with sanitize_text_field(), wp_kses(), or esc_html() calls on stored data.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must lure an authenticated administrator to a crafted page hosting a forged request. No prior privileges on the target site are required by the attacker. The scope changes because injected scripts execute in the context of other users' browsers, potentially compromising additional accounts. Refer to the Patchstack Vulnerability Analysis for additional context.

Detection Methods for CVE-2025-23842

Indicators of Compromise

• Unexpected <script> tags, event handlers, or encoded JavaScript payloads stored in gallery records within the WordPress database
• Administrator account activity originating from referrers outside the WordPress admin domain
• New or modified gallery entries created during sessions where the administrator did not consciously perform such actions
• Outbound requests from administrator browsers to unfamiliar domains following visits to external sites

Detection Strategies

• Review the wp_options, wp_posts, and plugin-specific tables for HTML or JavaScript artifacts in fields that should contain plain text
• Inspect web server access logs for POST requests to plugin endpoints lacking a same-origin Referer or Origin header
• Enable WordPress audit logging to capture plugin configuration changes and correlate them with administrator session activity

Monitoring Recommendations

• Deploy a Content Security Policy (CSP) with reporting enabled to detect inline script execution in administrator views
• Monitor for anomalous authenticated POST requests that lack the expected _wpnonce parameter
• Alert on creation or modification of gallery items by administrator accounts outside of normal working hours

How to Mitigate CVE-2025-23842

Immediate Actions Required

• Disable or remove the WordPress Gallery Plugin (wordpress-gallery-plugin) version 1.4 and earlier until a patched release is confirmed
• Audit all gallery entries for embedded scripts or HTML payloads and remove any suspicious content
• Rotate administrator credentials and invalidate active sessions if compromise is suspected
• Review WordPress user roles and remove unnecessary administrative privileges

Patch Information

At the time of publication, no vendor-supplied patch is referenced in the NVD record for versions beyond 1.4. Site operators should consult the Patchstack advisory for the latest remediation status and apply any subsequent plugin updates when released.

Workarounds

• Uninstall the vulnerable plugin and replace it with an actively maintained gallery alternative
• Restrict access to the WordPress administrative interface using IP allowlists or VPN-only access
• Deploy a Web Application Firewall (WAF) rule to block requests to plugin endpoints that lack a valid WordPress nonce parameter
• Require administrators to use isolated browsers or browser profiles dedicated to WordPress management to limit cross-site request exposure