NivoCart through 2.5.1 CAPTCHA Bypass via Answer Disclosed in Page HTML

Advisories

NivoCart through 2.5.1 CAPTCHA Bypass via Answer Disclosed in Page HTML

Severity: medium
Date: 10/15/2026
Affecting: nivocart <= 2.5.1
CVE: CVE-2026-111278
CWE: CWE-804 Guessable CAPTCHA
CVSS: 6.9
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References: GitHub Issue #27
https://github.com/nivocart/nivocart/blob/5bc2c3fc7caed9846b58959183f8ccf599cd4399/upload/catalog/controller/information/contact.php#L144-L150
https://github.com/nivocart/nivocart/blob/5bc2c3fc7caed9846b58959183f8ccf599cd4399/upload/catalog/view/theme/default/template/information/contact.tpl#L43
https://github.com/nivocart/nivocart
Credit: Aaron Amran Bin Amiruddin (@aaronamran)
Description: NivoCart through 2.5.1 contains a CAPTCHA bypass vulnerability that allows unauthenticated attackers to defeat form protection because the expected code is printed as plain text in the HTML. Attackers can fetch protected forms, extract the captcha_image value with a pattern match, and submit it to automate spam, registrations, reviews, and account deletion requests.

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