CVE-2025-48337: QuickCab Authorization Bypass Vulnerability

CVE-2025-48337 Overview

CVE-2025-48337 is a Missing Authorization vulnerability [CWE-862] affecting the QuickcabWP QuickCab plugin for WordPress. The flaw impacts all versions of QuickCab up to and including 1.3.3. Unauthenticated attackers can reach functionality that should be restricted to authorized users, resulting in broken access control on affected sites.

The vulnerability is network-exploitable with low attack complexity and does not require privileges or user interaction. Successful exploitation leads to limited integrity impact on the target WordPress installation, with no direct confidentiality or availability impact recorded in the CVSS vector.

Critical Impact
Unauthenticated attackers can invoke QuickCab plugin functionality that should require authorization, enabling unauthorized modifications on WordPress sites running QuickCab through version 1.3.3.

Affected Products

QuickcabWP QuickCab plugin for WordPress
QuickCab versions from n/a through 1.3.3
WordPress sites with the vulnerable plugin installed and active

Discovery Timeline

2025-06-06 - CVE-2025-48337 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-48337

Vulnerability Analysis

The vulnerability is a Missing Authorization flaw classified under [CWE-862]. QuickCab exposes one or more plugin actions that fail to verify whether the requesting user has permission to perform the operation. Because WordPress plugins commonly register callbacks through admin-post.php, admin-ajax.php, or the REST API, missing capability checks allow unauthenticated requests to trigger sensitive functions.

The CVSS vector indicates a limited integrity impact with no confidentiality or availability effect. This pattern is consistent with an endpoint that allows unauthorized modification of plugin data or state, rather than data exfiltration or site takeover.

An EPSS probability of 0.218% places CVE-2025-48337 in the lower tier of exploitation likelihood, but WordPress plugin flaws are frequently automated once proof-of-concept details circulate.

Root Cause

The root cause is the absence of authorization enforcement on plugin request handlers. WordPress requires developers to gate privileged operations with current_user_can() capability checks and, for state-changing actions, nonce verification via check_admin_referer() or wp_verify_nonce(). QuickCab through 1.3.3 omits these checks on at least one accessible endpoint.

Attack Vector

An attacker sends a crafted HTTP request to the vulnerable QuickCab endpoint over the network. No authentication or user interaction is needed. The request invokes plugin functionality that should be restricted, resulting in unauthorized changes within the scope granted to the missing check. See the Patchstack Vulnerability Report for technical details on the affected handler.

Detection Methods for CVE-2025-48337

Indicators of Compromise

Unauthenticated POST or GET requests to QuickCab plugin endpoints under /wp-admin/admin-ajax.php or /wp-admin/admin-post.php with QuickCab-specific action parameters.
Unexpected modifications to QuickCab configuration, bookings, or plugin-managed database rows without a corresponding administrator login.
Repeated requests from a single source targeting QuickCab actions without valid nonce parameters.

Detection Strategies

Review web server access logs for requests referencing quickcab action names originating from unauthenticated sessions.
Enable WordPress audit logging to correlate plugin-triggered database changes with authenticated user activity, flagging anonymous state changes.
Deploy a web application firewall rule that inspects requests to QuickCab endpoints for missing or invalid nonces.

Monitoring Recommendations

Alert on HTTP 200 responses to QuickCab AJAX or admin-post actions when the requesting session lacks a WordPress authentication cookie.
Monitor the QuickCab plugin version across all managed WordPress sites and flag any instance at or below 1.3.3.
Track outbound integrations tied to QuickCab for anomalous entries created outside normal business hours.

How to Mitigate CVE-2025-48337

Immediate Actions Required

Update the QuickCab plugin to a version later than 1.3.3 as soon as a patched release is available from QuickcabWP.
Audit QuickCab-managed data for unauthorized entries or modifications since the plugin was installed.
Restrict access to /wp-admin/admin-ajax.php and /wp-admin/admin-post.php at the WAF layer where feasible, limiting anonymous action names to a known allowlist.

Patch Information

At the time of publication, refer to the Patchstack Vulnerability Report for the current patch status. Administrators should apply the vendor update once released and confirm the installed version is greater than 1.3.3.

Workarounds

Deactivate and remove the QuickCab plugin until a patched version is installed if the functionality is not business-critical.
Apply a virtual patch through a WordPress-aware WAF that blocks unauthenticated requests to QuickCab action handlers.
Enforce IP allowlisting on the WordPress admin surface to reduce exposure of vulnerable plugin endpoints to the public internet.

bash

# Configuration example: block unauthenticated access to QuickCab AJAX actions at the web server
# Nginx example - reject anonymous requests targeting QuickCab actions
location = /wp-admin/admin-ajax.php {
    if ($arg_action ~* "^quickcab_") {
        if ($http_cookie !~* "wordpress_logged_in_") {
            return 403;
        }
    }
    include fastcgi_params;
    fastcgi_pass php_upstream;
}