Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-19862— JetFormBuilder < 3.6.5.2 - Unauthenticated Email Header Injection via Send Email Action

Quick assessment

Affected
Unknown JetFormBuilder
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

JetFormBuilder WordPress 插件在 3.6.5.2 版本之前，在将表单字段中的地址值添加到邮件头部时，未对换行符进行验证或过滤。这使得未经认证的用户可以注入任意邮件头部，添加隐藏收件人并伪造发件人。利用该漏洞需要站点配置为从表单字段获取邮件中的某个地址。

CVSS 4.8 · Medium EPSS 0.15% · P5

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown JetFormBuilder < 3.6.5.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-19862

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
JetFormBuilder < 3.6.5.2 - Unauthenticated Email Header Injection via Send Email Action
Source: CVE Program / CVE List V5
Vulnerability Description
The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients and spoof the sender. Exploitation requires the site to be configured to take one of the message's addresses from a form field.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown JetFormBuilder 0 ~ 3.6.5.2 -

II. Public POCs for CVE-2026-19862

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-19862

请登录查看更多情报信息。

Vendor Pages for CVE-2026-19862 (1)

Same Patch Batch · Unknown · 2026-09-06 · 10 CVEs total

CVE-2026-19859 6.5 MEDIUM JetFormBuilder < 3.6.5.2 - Unauthenticated Arbitrary Shortcode Execution via 'status' Para
CVE-2026-80437 4.8 MEDIUM Ninja Forms 3.14.10 - 3.15.1 - Unauthenticated Arbitrary Shortcode Execution via IP and Re
CVE-2026-80439 4.8 MEDIUM Redirection for Contact Form 7 2.2.7 - 3.2.10 - Unauthenticated Arbitrary Shortcode Execut
CVE-2026-85038 B2BKing < 5.2.40 - Unauthenticated B2B Group Assignment and Approval Bypass via Registrati
CVE-2026-84219 Kirki 6.2.1 - 6.2.5 - Unauthenticated Stored XSS via HTML Entity Decoding
CVE-2026-75793 SureCart < 4.7.0 - Unauthenticated Account Creation with Automatic Login
CVE-2026-18480 SureCart < 4.6.3 - Subscriber+ Administrator Account Takeover
CVE-2026-84028 Bold Page Builder < 5.9.9 - Contributor+ Stored XSS via Slider Elements' additional_settin
CVE-2026-13159 Real Estate Papi <= 1.0.5 - Subscriber+ Plugin Installation

IV. Related Vulnerabilities

Same product: JetFormBuilder
Same vendor: Unknown

V. Comments for CVE-2026-19862

No comments yet

Leave a comment