CVE-2026-66457

Deferred Deferred - Pending Action

Unauthenticated XSS in Events Manager

Publication date: 2026-08-06

Last updated on: 2026-09-22

Assigner: Patchstack

Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Pixelite Events Manager events-manager allows Reflected XSS.This issue affects Events Manager: from n/a through 7.4.2.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-06

Last Modified

2026-09-22

Generated

2026-10-06

AI Q&A

2026-08-06

EPSS Evaluated

2026-10-04

NVD

CVE-2026-66457

EUVD

EUVD-2026-53886

Affected Vendors & Products

Vendor	Product	Version / Range
events_manager	events_manager	to 7.4.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability affecting Events Manager plugin versions up to and including 7.4.1. XSS allows attackers to inject malicious scripts into web pages viewed by other users without needing authentication.

Detection Guidance

To detect this XSS vulnerability in Events Manager <= 7.4.1, inspect web application inputs for unsanitized user-supplied data. Check for reflected or stored XSS by testing input fields with basic XSS payloads like <script>alert(1)</script>. Review server responses for script execution.

Impact Analysis

An attacker could exploit this to steal user sessions, redirect users to malicious sites, or deface the website. Users with admin privileges could have their accounts compromised, leading to full site takeover.

Compliance Impact

This vulnerability could lead to data breaches, violating GDPR and HIPAA requirements for protecting user data. Organizations may face fines and legal consequences if user data is compromised through this XSS flaw.

Mitigation Strategies

Immediately update Events Manager to the latest version beyond 7.4.1. If an update is unavailable, disable the plugin temporarily. Implement input validation and output encoding for all user inputs. Use a web application firewall to filter malicious scripts.

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