CVE-2025-31584: Elfsight Testimonials Slider Auth Bypass

CVE-2025-31584 Overview

CVE-2025-31584 is a Missing Authorization vulnerability [CWE-862] in the Elfsight Testimonials Slider plugin for WordPress. The flaw affects all versions up to and including 1.0.1. Attackers with low-privilege authenticated access can exploit incorrectly configured access control security levels to perform actions restricted to higher-privileged users. The vulnerability results from missing capability checks on plugin actions rather than a memory safety or injection defect.

Critical Impact
Authenticated users with minimal privileges can bypass access control restrictions, leading to limited integrity and availability impact on WordPress sites running the affected plugin.

Affected Products

Elfsight Testimonials Slider WordPress plugin versions n/a through 1.0.1
WordPress sites using the elfsight-testimonials-slider plugin
Any deployment permitting low-privileged user registration alongside the vulnerable plugin

Discovery Timeline

2025-03-31 - CVE-2025-31584 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-31584

Vulnerability Analysis

The Elfsight Testimonials Slider plugin exposes functionality without validating the requester's WordPress capability level. The plugin registers action handlers that check whether a user is authenticated but omit checks confirming the user holds the required role, such as administrator or editor. Any authenticated user, including a subscriber, can invoke these protected actions.

The attack requires network access and low privileges. It does not require user interaction. Impact is limited to partial integrity and availability degradation of the plugin's functionality. Confidentiality is not directly affected.

Root Cause

The root cause is a missing authorization check [CWE-862]. Sensitive plugin endpoints rely on is_user_logged_in() or nonce verification alone without a subsequent current_user_can() capability check. WordPress nonces confirm request origin but do not enforce role-based access control. This design gap allows lateral abuse by any registered user.

Attack Vector

An attacker registers or compromises a low-privileged WordPress account on a target site. The attacker then issues crafted HTTP requests to plugin AJAX actions or admin-post handlers protected only by authentication. Because authorization is not enforced, the requests execute successfully and modify plugin state or configuration. See the Patchstack WordPress Vulnerability Report for advisory details.

No public proof-of-concept exploit code has been verified for this issue. Refer to the linked advisory for further technical context.

Detection Methods for CVE-2025-31584

Indicators of Compromise

Unexpected modifications to Elfsight Testimonials Slider widget configuration or testimonial content
HTTP POST requests to /wp-admin/admin-ajax.php referencing elfsight-testimonials-slider actions from non-administrative user sessions
New or unusual entries in WordPress wp_options or plugin-specific tables originating from subscriber-role accounts

Detection Strategies

Audit WordPress access logs for authenticated requests to plugin endpoints where the requesting user lacks administrative privileges
Monitor plugin configuration changes and correlate them with the initiating user role
Deploy web application firewall (WAF) rules that inspect AJAX actions targeting the vulnerable plugin

Monitoring Recommendations

Enable WordPress audit logging to capture user role, action name, and request payload for plugin-related endpoints
Alert on any subscriber or contributor account issuing requests to admin-ajax.php actions associated with elfsight-testimonials-slider
Track user registration spikes on sites with open registration, as these often precede exploitation of broken access control flaws

How to Mitigate CVE-2025-31584

Immediate Actions Required

Update the Elfsight Testimonials Slider plugin to a version above 1.0.1 as soon as a patched release is available
Disable open user registration on WordPress sites that do not require it
Review and remove unnecessary low-privileged accounts on affected installations

Patch Information

At the time of publication, the vendor advisory indicates the issue affects versions up to and including 1.0.1. Site operators should consult the Patchstack WordPress Vulnerability Report for current patch availability and apply the vendor-supplied update once released.

Workarounds

Temporarily deactivate the Elfsight Testimonials Slider plugin until a patched version is installed
Restrict access to /wp-admin/admin-ajax.php from unauthenticated or low-privilege sessions using WAF rules or reverse proxy filtering
Enforce role-based access at the network edge by blocking non-administrator sessions from reaching plugin action endpoints

bash

# Example: WordPress WP-CLI command to deactivate the vulnerable plugin
wp plugin deactivate elfsight-testimonials-slider