CVE-2024-51657: SmartLink Dynamic URLs CSRF Vulnerability

CVE-2024-51657 Overview

CVE-2024-51657 is a Cross-Site Request Forgery (CSRF) vulnerability in the Woopy Plugins SmartLink Dynamic URLs WordPress plugin (smartlink-dinamic-urls). The flaw affects all versions up to and including 1.1.0. An attacker can leverage the CSRF weakness to achieve Stored Cross-Site Scripting (XSS) by tricking an authenticated administrator into submitting a forged request. The injected script then persists in the plugin's stored data and executes whenever a victim loads the affected page. The vulnerability is tracked under CWE-352: Cross-Site Request Forgery.

Critical Impact
Successful exploitation chains CSRF into Stored XSS, allowing attackers to execute arbitrary JavaScript in the browser context of WordPress administrators and site visitors, enabling session theft, content tampering, and follow-on account takeover.

Affected Products

Woopy Plugins SmartLink Dynamic URLs (smartlink-dinamic-urls)
All versions from n/a through 1.1.0
WordPress sites with the affected plugin installed and active

Discovery Timeline

2024-11-19 - CVE-2024-51657 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-51657

Vulnerability Analysis

The vulnerability combines two distinct weaknesses into a single exploit chain. First, the SmartLink Dynamic URLs plugin lacks proper CSRF protection on state-changing requests, such as missing or improperly validated WordPress nonces. Second, user-supplied input handled by those requests is stored without adequate output encoding or sanitization, producing a Stored XSS sink.

An unauthenticated attacker cannot directly invoke the vulnerable action. Instead, the attacker crafts a malicious page or link and lures a logged-in administrator into visiting it. The victim's browser then issues an authenticated request to the WordPress site, which the plugin processes as legitimate. Because the request stores attacker-controlled markup, the payload persists across sessions and executes for any subsequent viewer of the affected page.

The scope change reflected in the CVSS metrics indicates that exploitation in the plugin context impacts the broader WordPress application and its users. The EPSS data places this issue in the lower percentile for near-term exploitation likelihood, but the public advisory and trivial exploitation pattern raise the practical risk on exposed sites.

Root Cause

The root cause is the absence of anti-CSRF token validation on plugin endpoints that accept and persist user input. WordPress provides wp_nonce_field() and check_admin_referer() helpers for this purpose, but the vulnerable handlers do not enforce them. Compounding the issue, the stored input is later rendered without escaping through functions such as esc_html() or esc_attr().

Attack Vector

The attack vector is network-based and requires user interaction from a privileged WordPress user. An attacker hosts a page containing a hidden form or fetch() call that targets the vulnerable plugin endpoint. When an authenticated administrator visits the attacker-controlled page, the browser auto-submits the request with valid session cookies. The plugin processes the forged request, stores the malicious JavaScript payload, and serves it to subsequent visitors. Refer to the Patchstack WordPress Vulnerability Advisory for the technical breakdown.

Detection Methods for CVE-2024-51657

Indicators of Compromise

Unexpected <script>, onerror, or onload attributes in records stored by the SmartLink Dynamic URLs plugin in the WordPress database.
POST requests to wp-admin/admin.php or admin-post.php referencing the smartlink-dinamic-urls plugin without a corresponding Referer header from the same origin.
WordPress administrator sessions originating from anomalous IP addresses shortly after visiting external links.
New or modified administrator accounts created shortly after a stored payload was rendered.

Detection Strategies

Inspect plugin options and post meta tables for HTML or JavaScript content that should not be present in plain-text configuration fields.
Review web server access logs for POST requests to plugin endpoints lacking the expected _wpnonce parameter.
Deploy a Web Application Firewall (WAF) rule that flags requests to the plugin's admin endpoints missing a valid nonce or same-origin Referer.

Monitoring Recommendations

Enable WordPress audit logging to capture plugin setting changes and correlate them with administrator session activity.
Monitor browser-side telemetry for unexpected outbound requests from WordPress admin pages, which may indicate XSS payload execution.
Track plugin inventory and alert on installations of smartlink-dinamic-urls at version 1.1.0 or earlier.

How to Mitigate CVE-2024-51657

Immediate Actions Required

Deactivate and remove the SmartLink Dynamic URLs plugin if a patched version is not available for your environment.
Audit the WordPress database for stored payloads in fields managed by the plugin and remove any injected scripts.
Force a password reset and session invalidation for all administrator accounts that may have interacted with the plugin admin pages.
Review the Patchstack advisory for the current remediation status.

Patch Information

At the time of publication, the advisory lists affected versions through 1.1.0 with no fixed version specified. Site operators should monitor the plugin's WordPress.org listing and the Patchstack advisory for a security release and apply it immediately upon availability.

Workarounds

Restrict access to wp-admin by IP allowlist to limit exposure of authenticated administrators to CSRF lures.
Deploy a WAF rule or plugin that enforces same-origin Referer checks on POST requests to the plugin's endpoints.
Apply Content Security Policy (CSP) headers that disallow inline scripts to reduce the impact of any stored XSS payload.
Train administrators to avoid clicking untrusted links while logged into WordPress and to use separate browser profiles for administrative work.

bash

# Example nginx rule to block requests to the vulnerable plugin path without a same-origin Referer
location ~* /wp-content/plugins/smartlink-dinamic-urls/ {
    if ($http_referer !~* "^https?://your-site\.example/") {
        return 403;
    }
}