HookAndHook Image CAPTCHA Plugin up to 3.3.29 Captcha cf7ic_check_if_spam kc_captcha improper authentication

Summaryinfo

A vulnerability was found in HookAndHook Image CAPTCHA Plugin up to 3.3.29 and classified as problematic. This vulnerability affects the function cf7ic_check_if_spam of the component Captcha. Such manipulation of the argument kc_captcha leads to improper authentication. This vulnerability is listed as CVE-2026-127206. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in HookAndHook Image CAPTCHA Plugin up to 3.3.29. Affected by this issue is the function cf7ic_check_if_spam of the component Captcha. The manipulation of the argument kc_captcha with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is integrity. CVE summarizes:

Image CAPTCHA for Contact Form 7 and WPForms through 3.3.29 contains a CAPTCHA bypass vulnerability that allows unauthenticated attackers to defeat the anti-automation control by exploiting a hardcoded static answer in the Contact Form 7 integration. Attackers can submit kc_captcha=kc_human to pass validation in cf7ic_check_if_spam() on every protected form, enabling automated contact-form spam and abuse of actions gated only by this CAPTCHA.

The advisory is available at hackmd.io. This vulnerability is handled as CVE-2026-127206 since 11/12/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/12/2026).

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• HookAndHook

Name

• Image CAPTCHA Plugin

Version

• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 3.3.5
• 3.3.6
• 3.3.7
• 3.3.8
• 3.3.9
• 3.3.10
• 3.3.11
• 3.3.12
• 3.3.13
• 3.3.14
• 3.3.15
• 3.3.16
• 3.3.17
• 3.3.18
• 3.3.19
• 3.3.20
• 3.3.21
• 3.3.22
• 3.3.23
• 3.3.24
• 3.3.25
• 3.3.26
• 3.3.27
• 3.3.28
• 3.3.29

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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