The SentinelOne Annual Threat Report - A Defenders Guide from the FrontlinesThe SentinelOne Annual Threat ReportGet the Report
Experiencing a Breach?Blog
Get StartedContact Us
SentinelOne
  • Platform
    Platform Overview
    • Singularity Platform
      Welcome to Integrated Enterprise Security
    • AI for Security
      Leading the Way in AI-Powered Security Solutions
    • Securing AI
      Accelerate AI Adoption with Secure AI Tools, Apps, and Agents.
    • How It Works
      The Singularity XDR Difference
    • Singularity Marketplace
      One-Click Integrations to Unlock the Power of XDR
    • Pricing & Packaging
      Comparisons and Guidance at a Glance
    Data & AI
    • Purple AI
      Accelerate SecOps with Generative AI
    • Singularity Hyperautomation
      Easily Automate Security Processes
    • AI-SIEM
      The AI SIEM for the Autonomous SOC
    • AI Data Pipelines
      Security Data Pipeline for AI SIEM and Data Optimization
    • Singularity Data Lake
      AI-Powered, Unified Data Lake
    • Singularity Data Lake for Log Analytics
      Seamlessly Ingest Data from On-Prem, Cloud or Hybrid Environments
    Endpoint Security
    • Singularity Endpoint
      Autonomous Prevention, Detection, and Response
    • Singularity XDR
      Native & Open Protection, Detection, and Response
    • Singularity RemoteOps Forensics
      Orchestrate Forensics at Scale
    • Singularity Threat Intelligence
      Comprehensive Adversary Intelligence
    • Singularity Vulnerability Management
      Application & OS Vulnerability Management
    • Singularity Identity
      Identity Threat Detection and Response
    Cloud Security
    • Singularity Cloud Security
      Block Attacks with an AI-Powered CNAPP
    • Singularity Cloud Native Security
      Secure Cloud and Development Resources
    • Singularity Cloud Workload Security
      Real-Time Cloud Workload Protection Platform
    • Singularity Cloud Data Security
      AI-Powered Threat Detection for Cloud Storage
    • Singularity Cloud Security Posture Management
      Detect and Remediate Cloud Misconfigurations
    Securing AI
    • Prompt Security
      Secure AI Tools Across Your Enterprise
  • Why SentinelOne?
    Why SentinelOne?
    • Why SentinelOne?
      Cybersecurity Built for What’s Next
    • Our Customers
      Trusted by the World’s Leading Enterprises
    • Industry Recognition
      Tested and Proven by the Experts
    • About Us
      The Industry Leader in Autonomous Cybersecurity
    Compare SentinelOne
    • Arctic Wolf
    • Broadcom
    • CrowdStrike
    • Cybereason
    • Microsoft
    • Palo Alto Networks
    • Sophos
    • Splunk
    • Trellix
    • Trend Micro
    • Wiz
    Verticals
    • Energy
    • Federal Government
    • Finance
    • Healthcare
    • Higher Education
    • K-12 Education
    • Manufacturing
    • Retail
    • State and Local Government
  • Services
    Managed Services
    • Managed Services Overview
      Wayfinder Threat Detection & Response
    • Threat Hunting
      World-Class Expertise and Threat Intelligence
    • Managed Detection & Response
      24/7/365 Expert MDR Across Your Entire Environment
    • Incident Readiness & Response
      DFIR, Breach Readiness, & Compromise Assessments
    Support, Deployment, & Health
    • Technical Account Management
      Customer Success with Personalized Service
    • SentinelOne GO
      Guided Onboarding & Deployment Advisory
    • SentinelOne University
      Live and On-Demand Training
    • Services Overview
      Comprehensive Solutions for Seamless Security Operations
    • SentinelOne Community
      Community Login
  • Partners
    Our Network
    • MSSP Partners
      Succeed Faster with SentinelOne
    • Singularity Marketplace
      Extend the Power of S1 Technology
    • Cyber Risk Partners
      Enlist Pro Response and Advisory Teams
    • Technology Alliances
      Integrated, Enterprise-Scale Solutions
    • SentinelOne for AWS
      Hosted in AWS Regions Around the World
    • Channel Partners
      Deliver the Right Solutions, Together
    • SentinelOne for Google Cloud
      Unified, Autonomous Security Giving Defenders the Advantage at Global Scale
    • Partner Locator
      Your Go-to Source for Our Top Partners in Your Region
    Partner Portal→
  • Resources
    Resource Center
    • Case Studies
    • Data Sheets
    • eBooks
    • Reports
    • Videos
    • Webinars
    • Whitepapers
    • Events
    View All Resources→
    Blog
    • Feature Spotlight
    • For CISO/CIO
    • From the Front Lines
    • Identity
    • Cloud
    • macOS
    • SentinelOne Blog
    Blog→
    Tech Resources
    • SentinelLABS
    • Ransomware Anthology
    • Cybersecurity 101
  • About
    About SentinelOne
    • About SentinelOne
      The Industry Leader in Cybersecurity
    • Investor Relations
      Financial Information & Events
    • SentinelLABS
      Threat Research for the Modern Threat Hunter
    • Careers
      The Latest Job Opportunities
    • Press & News
      Company Announcements
    • Cybersecurity Blog
      The Latest Cybersecurity Threats, News, & More
    • FAQ
      Get Answers to Our Most Frequently Asked Questions
    • DataSet
      The Live Data Platform
    • S Foundation
      Securing a Safer Future for All
    • S Ventures
      Investing in the Next Generation of Security, Data and AI
  • Pricing
Get StartedContact Us
CVE Vulnerability Database
Vulnerability Database/CVE-2025-52750

CVE-2025-52750: Emu2 Email Users Plugin XSS Vulnerability

CVE-2025-52750 is a reflected cross-site scripting flaw in the Emu2 Email Users plugin affecting versions up to 0.83b. Attackers can inject malicious scripts into web pages. This article covers technical details, affected versions, impact, and mitigation strategies.

Published: April 22, 2026

CVE-2025-52750 Overview

CVE-2025-52750 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the Emu2 (emu2-email-users-2) WordPress plugin developed by Juergen Schulze. This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users, potentially leading to session hijacking, credential theft, or malicious content delivery.

The vulnerability stems from improper neutralization of user-supplied input during web page generation. When exploited, an attacker can craft a malicious URL containing JavaScript code that executes in the context of the victim's browser session when they click the link.

Critical Impact

Attackers can execute arbitrary JavaScript in victim browsers, potentially stealing session cookies, credentials, or performing actions on behalf of authenticated users.

Affected Products

  • Emu2 (emu2-email-users-2) WordPress Plugin version 0.83b and earlier
  • WordPress installations with the vulnerable plugin installed
  • All configurations of affected versions

Discovery Timeline

  • 2025-10-22 - CVE-2025-52750 published to NVD
  • 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-52750

Vulnerability Analysis

This Reflected XSS vulnerability (CWE-79) in the Emu2 WordPress plugin occurs when user-controlled input is reflected back in the HTTP response without proper sanitization or encoding. The plugin fails to adequately validate and encode special characters in user input before incorporating them into dynamically generated web pages.

Reflected XSS attacks require social engineering to trick victims into clicking a specially crafted link. Once clicked, the malicious script executes within the security context of the vulnerable application, giving attackers access to session tokens, cookies, and the ability to perform actions as the authenticated user.

The vulnerability requires network access and user interaction to exploit, as victims must be enticed to click a malicious link. Upon successful exploitation, the attack can affect resources beyond the vulnerable component's security scope, enabling session hijacking and data exfiltration.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding in the Emu2 plugin. The plugin accepts user input through request parameters and reflects this input in the response without applying proper HTML entity encoding or JavaScript escaping. This allows special characters such as <, >, ", and ' to be interpreted as HTML/JavaScript syntax rather than literal text.

WordPress plugins are expected to use functions like esc_html(), esc_attr(), and wp_kses() to sanitize output, but the vulnerable code path in Emu2 bypasses these security measures.

Attack Vector

The attack vector for CVE-2025-52750 is network-based, requiring the attacker to craft a malicious URL containing the XSS payload and convince a victim to click it. Typical attack scenarios include:

The attacker identifies a vulnerable parameter in the Emu2 plugin that reflects user input without sanitization. They then construct a URL containing malicious JavaScript in that parameter. When a victim clicks this link, the JavaScript executes in their browser with full access to the page's DOM, cookies, and session data.

Common exploitation techniques include stealing session cookies via document.cookie, keylogging through DOM event handlers, and redirecting users to phishing pages. The attacker may distribute the malicious link through phishing emails, social media, or compromised websites.

Detection Methods for CVE-2025-52750

Indicators of Compromise

  • Suspicious URL parameters containing encoded JavaScript or HTML tags in requests to WordPress sites
  • Web server logs showing requests with <script> tags or JavaScript event handlers in query strings
  • Unusual client-side redirects or cookie exfiltration attempts originating from legitimate WordPress pages
  • User reports of unexpected behavior after clicking links to your WordPress site

Detection Strategies

  • Implement Web Application Firewall (WAF) rules to detect and block common XSS payloads in URL parameters
  • Monitor web server access logs for suspicious query strings containing script tags, event handlers, or encoded payloads
  • Deploy browser-based Content Security Policy (CSP) headers to restrict inline script execution
  • Utilize SentinelOne's behavioral analysis to detect unusual JavaScript execution patterns

Monitoring Recommendations

  • Enable verbose logging for the WordPress admin area and plugin interactions
  • Configure alerts for requests containing potential XSS indicators such as <script>, javascript:, onerror=, or onload=
  • Monitor for unusual session activity or cookie access patterns that may indicate successful exploitation
  • Review WordPress plugin update notifications and security advisories regularly

How to Mitigate CVE-2025-52750

Immediate Actions Required

  • Deactivate and remove the Emu2 (emu2-email-users-2) plugin immediately if not critical to operations
  • Implement a Web Application Firewall (WAF) with XSS protection rules in front of the WordPress installation
  • Enable Content Security Policy (CSP) headers with strict inline script restrictions
  • Review access logs for evidence of exploitation attempts

Patch Information

As of the last update, the vulnerability affects Emu2 version 0.83b and earlier. Site administrators should check the Patchstack WordPress Vulnerability Database for the latest patch status and recommended updates. If no patched version is available, consider replacing the plugin with a secure alternative.

Workarounds

  • Remove or deactivate the Emu2 plugin until a security patch is available
  • Implement server-side input validation to filter potentially malicious characters from all user inputs
  • Deploy Content Security Policy headers to prevent inline script execution: Content-Security-Policy: script-src 'self';
  • Use a WordPress security plugin to add additional XSS protection layers
bash
# Add CSP header in Apache .htaccess
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';"

# Add CSP header in Nginx
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline';";

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

  • Vulnerability Details
  • TypeXSS

  • Vendor/TechEmu2

  • SeverityHIGH

  • CVSS Score7.1

  • EPSS Probability0.07%

  • Known ExploitedNo
  • CVSS Vector
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
  • Impact Assessment
  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityLow
  • CWE References
  • CWE-79
  • Technical References
  • Patchstack WordPress Vulnerability
  • Latest CVEs
  • CVE-2026-8468: Elixir Plug Library DoS Vulnerability

  • CVE-2026-8295: simdjson Information Disclosure Vulnerability

  • CVE-2025-68421: Comarch ERP Optima Auth Bypass Vulnerability

  • CVE-2025-68420: Comarch ERP Optima Privilege Escalation
Default Legacy - Prefooter | Experience the World’s Most Advanced Cybersecurity Platform

Experience the World’s Most Advanced Cybersecurity Platform

See how our intelligent, autonomous cybersecurity platform can protect your organization now and into the future.

Try SentinelOne
  • Get Started
  • Get a Demo
  • Product Tour
  • Why SentinelOne
  • Pricing & Packaging
  • FAQ
  • Contact
  • Contact Us
  • Customer Support
  • SentinelOne Status
  • Language
  • Platform
  • Singularity Platform
  • Singularity Endpoint
  • Singularity Cloud
  • Singularity AI-SIEM
  • Singularity Identity
  • Singularity Marketplace
  • Purple AI
  • Services
  • Wayfinder TDR
  • SentinelOne GO
  • Technical Account Management
  • Support Services
  • Verticals
  • Energy
  • Federal Government
  • Finance
  • Healthcare
  • Higher Education
  • K-12 Education
  • Manufacturing
  • Retail
  • State and Local Government
  • Cybersecurity for SMB
  • Resources
  • Blog
  • Labs
  • Case Studies
  • Videos
  • Product Tours
  • Events
  • Cybersecurity 101
  • eBooks
  • Webinars
  • Whitepapers
  • Press
  • News
  • Ransomware Anthology
  • Company
  • About Us
  • Our Customers
  • Careers
  • Partners
  • Legal & Compliance
  • Security & Compliance
  • Investor Relations
  • S Foundation
  • S Ventures

©2026 SentinelOne, All Rights Reserved.

Privacy Notice Terms of Use

English