OOPSpam Anti-Spam Plugin up to 1.2.53 on WordPress Header X-Forwarded-For protection mechanism

Summaryinfo

A vulnerability classified as critical has been found in OOPSpam Anti-Spam Plugin up to 1.2.53 on WordPress. Affected by this issue is some unknown functionality of the component Header Handler. The manipulation of the argument X-Forwarded-For leads to an unknown weakness. This vulnerability is traded as CVE-2025-12094. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in OOPSpam Anti-Spam Plugin up to 1.2.53 on WordPress. It has been rated as critical. This issue affects some unknown processing of the component Header Handler. The manipulation of the argument X-Forwarded-For with an unknown input leads to a unknown weakness. Using CWE to declare the problem leads to CWE-693. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2025-12094. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/31/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-37313). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Anti-Spam Software

Name

• OOPSpam Anti-Spam Plugin

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9
• 1.2.10
• 1.2.11
• 1.2.12
• 1.2.13
• 1.2.14
• 1.2.15
• 1.2.16
• 1.2.17
• 1.2.18
• 1.2.19
• 1.2.20
• 1.2.21
• 1.2.22
• 1.2.23
• 1.2.24
• 1.2.25
• 1.2.26
• 1.2.27
• 1.2.28
• 1.2.29
• 1.2.30
• 1.2.31
• 1.2.32
• 1.2.33
• 1.2.34
• 1.2.35
• 1.2.36
• 1.2.37
• 1.2.38
• 1.2.39
• 1.2.40
• 1.2.41
• 1.2.42
• 1.2.43
• 1.2.44
• 1.2.45
• 1.2.46
• 1.2.47
• 1.2.48
• 1.2.49
• 1.2.50
• 1.2.51
• 1.2.52
• 1.2.53

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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