OOPSpam Anti-Spam: Spam Protection for WordPress Forms & Comments (No CAPTCHA) <= 1.2.53 - Unauthenticated IP Header Spoofing

Protection Mechanism Failure
CVE CVE-2025-12094
CVSS Medium (5.3)
Publicly Published October 30, 2025
Last Updated October 31, 2025
Researcher Jonas Benjamin Friedli
Description

The OOPSpam Anti-Spam: Spam Protection for WordPress Forms & Comments (No CAPTCHA) plugin for WordPress is vulnerable to IP Header Spoofing in all versions up to, and including, 1.2.53. This is due to the plugin trusting client-controlled forwarded headers (such as CF-Connecting-IP, X-Forwarded-For, and others) without verifying that those headers originate from legitimate, trusted proxies. This makes it possible for unauthenticated attackers to spoof their IP address and bypass IP-based security controls, including blocked IP lists and rate limiting protections, by sending arbitrary HTTP headers with their requests.

References

1 affected software package

Software Type Plugin
Software Slug oopspam-anti-spam (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.2.53
Patched Version
  • 1.2.54
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