Joomshaper SP Page Builder Pro Extension up to 5.1.4/6.9.0 optin_form captcha_question/captcha_answer improper authentication

Summaryinfo

A vulnerability described as critical has been identified in Joomshaper SP Page Builder Pro Extension up to 5.1.4/6.9.0. The impacted element is an unknown function of the component optin_form. Such manipulation of the argument captcha_question/captcha_answer leads to improper authentication. This vulnerability is referenced as CVE-2026-79700. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Joomshaper SP Page Builder Pro Extension up to 5.1.4/6.9.0 and classified as critical. Affected by this issue is an unknown code block of the component optin_form. The manipulation of the argument captcha_question/captcha_answer 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 confidentiality, integrity, and availability. CVE summarizes:

Joomla Extension - joomshaper.com - Unauthenticated CAPTCHA Bypass via Request-Controlled CAPTCHA Configuration in SP Page Builder Pro 5.1.4 - 6.9.0 - The optin_form addon read the CAPTCHA type, the expected answer and the enabled flag from the request rather than from the stored addon configuration. Verification reduced to md5($captcha_question) != $captcha_answer with both operands supplied by the attacker, so any value passed.

The advisory is shared for download at joomshaper.com. This vulnerability is handled as CVE-2026-79700 since 08/25/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/14/2026).

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Joomshaper

Name

• SP Page Builder Pro Extension

Version

• 5.1.0
• 5.1.1
• 5.1.2
• 5.1.3
• 5.1.4
• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8
• 6.9.0

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