CVE-2025-46523: COVID-19 Alert Plugin XSS Vulnerability

CVE-2025-46523 Overview

CVE-2025-46523 is a stored cross-site scripting (XSS) vulnerability in the devignstudiosltd COVID-19 (Coronavirus) Update Your Customers WordPress plugin, tracked as covid-19-alert. The flaw affects all plugin versions up to and including 1.5.1. It stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. An authenticated attacker with high privileges can inject persistent JavaScript that executes in the browser of any user who views the affected page. The scope-changed impact means the injected script can affect resources beyond the vulnerable component, extending the reach of any successful attack.

Critical Impact
Authenticated attackers can inject persistent JavaScript payloads that execute in the context of site visitors and administrators, enabling session theft, credential harvesting, and further compromise of the WordPress site.

Affected Products

devignstudiosltd COVID-19 (Coronavirus) Update Your Customers plugin (covid-19-alert)
All versions from initial release through 1.5.1
WordPress sites with the plugin installed and activated

Discovery Timeline

2025-04-24 - CVE-2025-46523 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46523

Vulnerability Analysis

The vulnerability is a stored cross-site scripting flaw in the covid-19-alert WordPress plugin. Stored XSS payloads persist in the site database and execute each time the affected page loads in a browser. Exploitation requires high-privilege authentication and user interaction, but the resulting script runs with the privileges of the victim viewing the page. Because the vulnerability changes scope, injected code can affect resources managed outside the plugin's own security boundary, including administrative sessions and cookies scoped to the wider WordPress installation.

Root Cause

The plugin fails to sanitize or encode input before rendering it in HTML output. Data supplied through plugin configuration or content fields is stored in the WordPress database and later reflected into pages without escaping. When a browser parses the resulting HTML, injected <script> tags or event handler attributes execute as legitimate page content. The absence of output encoding via WordPress functions such as esc_html(), esc_attr(), or wp_kses() is the underlying defect.

Attack Vector

An attacker with administrative access to the plugin submits malicious HTML or JavaScript through a vulnerable input field. The payload is saved to the database and served to any user visiting the affected page. Victims trigger execution simply by rendering the page, requiring only one user interaction. Payloads can steal session cookies, perform actions on behalf of the victim, redirect visitors to attacker-controlled infrastructure, or load additional exploit code. Refer to the Patchstack WordPress Vulnerability Advisory for advisory details.

Detection Methods for CVE-2025-46523

Indicators of Compromise

Unexpected <script> tags, javascript: URIs, or inline event handlers such as onerror and onload present in plugin-managed content fields in the WordPress database.
Outbound HTTP requests from visitor browsers to unfamiliar domains coinciding with visits to pages rendered by the covid-19-alert plugin.
Administrator sessions used from unexpected IP addresses shortly after viewing plugin-generated content.

Detection Strategies

Query the wp_options and wp_postmeta tables for entries associated with the covid-19-alert plugin containing HTML tags, script fragments, or encoded payloads.
Deploy a web application firewall rule set that inspects responses for script content originating from plugin-controlled fields.
Review WordPress audit logs for administrative edits to plugin settings by accounts that do not typically manage the plugin.

Monitoring Recommendations

Enable Content Security Policy (CSP) reporting to surface unexpected inline script execution on WordPress pages.
Monitor for anomalous JavaScript execution and outbound connections from browsers rendering WordPress administrative pages.
Alert on modifications to plugin configuration and forward the events to a centralized log platform for correlation with authentication events.

How to Mitigate CVE-2025-46523

Immediate Actions Required

Deactivate and remove the covid-19-alert plugin until a patched release is available, since no fixed version is identified in the current advisory.
Audit all administrator and editor accounts, rotate credentials, and enforce multi-factor authentication to reduce the risk of authenticated exploitation.
Inspect plugin-managed content and database entries for injected script payloads and remove any unauthorized markup.

Patch Information

The advisory published by Patchstack lists affected versions up to and including 1.5.1 with no confirmed patched release identified in the vendor data available. Site owners should monitor the Patchstack advisory and the plugin's WordPress.org listing for an official fix. Until a patch is released, uninstalling the plugin is the recommended remediation.

Workarounds

Remove the plugin from all WordPress instances and replace its functionality with a maintained alternative.
Restrict administrative access to the WordPress dashboard using IP allow-listing and strong authentication controls.
Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.

bash

# Configuration example: remove the vulnerable plugin via WP-CLI
wp plugin deactivate covid-19-alert
wp plugin uninstall covid-19-alert