CVE-2026-111278
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.
Does this matter?
Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.32% probability · 25th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-804
- Source
- disclosure@vulncheck.com
EPSS moved from 0.3% on 16 October 2026 to 0.3% on 27 October 2026.
References
- https://github.com/nivocart/nivocart
- 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/issues/27
- https://www.vulncheck.com/advisories/nivocart-through-2.5.1-captcha-bypass-via-answer-disclosed-in-page-html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.