CVE-2026-79700: Joomla Extension - joomshaper.com - Unauthenticated CAPTCHA Bypass via Request-Controlled CAPTCHA Configuration in SP Page Builder Pro 5.1.4 - 6.9.0

Q: Does exploiting this issue require a Joomla account or prior authentication?

No. The affected optin_form addon can be bypassed by an unauthenticated attacker.

Q: What does an attacker need to control to bypass CAPTCHA verification?

The attacker must be able to supply CAPTCHA-related request values, including the CAPTCHA type, expected answer, and enabled flag. Because the verification compared attacker-supplied operands, the attacker could make the check pass with arbitrary values.

Published Sep 14, 2026

Updated

Joomla Extension - joomshaper.com - Unauthenticated CAPTCHA Bypass via Request-Controlled CAPTCHA Configuration in SP Page Builder Pro 5.1.4 - 6.9.0 - The optinform 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($captchaquestion) != $captchaanswer with both operands supplied by the attacker, so any value passed.

Affected Software

1 affected component

SP Page Builder Pro>=5.1.4<=6.9.0

Event History

Sep 14, 2026

CVE Published

via MITRE·10:59 AM

Data Sourced

via MITRE·10:59 AM

DescriptionWeakness

Frequently Asked Questions

Does exploiting this issue require a Joomla account or prior authentication?

No. The affected optin_form addon can be bypassed by an unauthenticated attacker.

What does an attacker need to control to bypass CAPTCHA verification?

The attacker must be able to supply CAPTCHA-related request values, including the CAPTCHA type, expected answer, and enabled flag. Because the verification compared attacker-supplied operands, the attacker could make the check pass with arbitrary values.