# CVE-2026-121570: WP Chill RSVP and Event Management stored XSS

Source: https://junglewise.ai/threats/cve-2026-121570-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-09. Updated: 2026-11-09  
License: CC BY 4.0 with a link back

CVE-2026-121570 · Severity: high · CVSS 7.1 · Published 2026-11-09

WP Chill RSVP and Event Management is a WordPress plugin for managing event registrations and RSVP submissions. A stored cross-site scripting (XSS) vulnerability in versions up to 2.7.17 allows attackers to inject malicious scripts that execute in visitors' browsers, potentially stealing data or hijacking accounts. Websites using this plugin should update immediately to version 2.7.18 or later.

Technologies: [WP Chill RSVP and Event Management](https://junglewise.ai/threats/technologies/rsvp-and-event-management). Vendors: [WP Chill](https://junglewise.ai/threats/vendors/wp-chill).

## Quick answers

**Is CVE-2026-121570 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121570 being exploited in the wild.

**How severe is CVE-2026-121570?** High severity, with a CVSS score of 7.1, published 9 November 2026.

**Which products and versions are affected?** WP Chill RSVP and Event Management through 2.7.17.

**Is there a fix for CVE-2026-121570?** Yes: fixed in 2.7.18. Until then: Patchstack has issued a mitigation rule to block attacks until the plugin is updated. As an immediate action, update the plugin to version 2.7.18 or later; if unable to do so directly, contact your hosting provider or web developer for assistance. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121570 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-121570?** Check whether you run WP Chill RSVP and Event Management at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.7.18

Patchstack has issued a mitigation rule to block attacks until the plugin is updated. As an immediate action, update the plugin to version 2.7.18 or later; if unable to do so directly, contact your hosting provider or web developer for assistance.

## Technical details

The vulnerability is a stored XSS in the RSVP and Event Management plugin affecting versions through 2.7.17. User interaction is required during exploitation, suggesting the attack vector involves tricking an authenticated user into clicking a malicious link or visiting a crafted page. The injected script persists in the plugin's data store and executes for all site visitors, allowing credential theft or account compromise.

## Affected products

- WP Chill RSVP and Event Management through 2.7.17

## Timeline

- 2026-11-09: disclosed
- 2026-11-07: patched: Version 2.7.18 released

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/rsvp/vulnerability/wordpress-rsvp-and-event-management-plugin-2-7-17-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/rsvp/vulnerability/wordpress-rsvp-and-event-management-plugin-2-7-17-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [WP Chill RSVP and Event Management missing authorization](https://junglewise.ai/threats/cve-2026-27398-wp-chill-rsvp-and-event-management-missing-authorization)
- [WP Chill RSVP and Event Management sensitive data exposure](https://junglewise.ai/threats/cve-2026-39536-wp-chill-rsvp-and-event-management-sensitive-data-exposure)