---
id: "CVE-2026-110903"
kind: "vulnerability"
aliases: ["CVE-2026-110903"]
title: "The Events Calendar WordPress plugin: stored XSS through 6.18.1"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "self-hosted", "the-events-calendar", "wordpress"]
not_affected_if: ["plugin-version-above-6.18.1"]
published_at: "2026-10-16T13:16:55+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T03:57:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110903", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# The Events Calendar WordPress plugin: stored XSS through 6.18.1

The Events Calendar, a WordPress plugin by Liquid Web and StellarWP, fails to neutralize input when generating web pages, enabling stored cross-site scripting. An attacker who can store malicious input in the plugin's fields can run script in other users' browsers.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed The Events Calendar plugin version in the WordPress admin under Plugins, or with `wp plugin get the-events-calendar --field=version`
- Compare the installed version against 6.18.1 and older

## Fix

- Update The Events Calendar to a version later than `6.18.1`, per the vendor's release
- unknown whether a patched version number is published in the sources

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-110903

## From the sources

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Liquid Web / StellarWP The Events Calendar the-events-calendar allows Stored XSS.This issue affects The Events Calendar: from n/a through 6.18.1.

---

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