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CVE-2026-1890— LeadConnector < 3.0.22 - Unauthenticated Rest Call

Quick assessment

Affected
Unknown LeadConnector
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin LeadConnector 3.0.22之前版本存在安全漏洞，该漏洞源于REST路由中缺少授权，可能导致未经验证的用户调用并覆盖现有数据。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.68% · P50

Public Exploits 1

Nuclei · 1 CVE-2026-1890.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1890

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
LeadConnector < 3.0.22 - Unauthenticated Rest Call
Source: CVE Program / CVE List V5
Vulnerability Description
The LeadConnector WordPress plugin before 3.0.22 does not have authorization in a REST route, allowing unauthenticated users to call it and overwrite existing data
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin LeadConnector 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin LeadConnector 3.0.22之前版本存在安全漏洞，该漏洞源于REST路由中缺少授权，可能导致未经验证的用户调用并覆盖现有数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown LeadConnector 0 ~ 3.0.22 -

II. Public POCs for CVE-2026-1890

# POC Description Source Link Shenlong Link
1 LeadConnector WordPress plugin < 3.0.22 contains a broken access control caused by missing authorization in a REST route, letting unauthenticated attackers overwrite existing data remotely, exploit requires no authentication. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-1890.yaml POC Details
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III. Intelligence Information for CVE-2026-1890

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Vendor Advisories for CVE-2026-1890 (1)

Same Patch Batch · Unknown · 2026-03-26 · 4 CVEs total

CVE-2026-1430 WP Lightbox 2 < 3.0.7 - Admin+ Stored XSS
CVE-2025-15488 Responsive Plus < 3.4.3 - Unauthenticated Arbitrary Shortcode Execution
CVE-2025-15433 Shared Files < 1.7.58 - Contributor+ Arbitrary File Download

IV. Related Vulnerabilities

Same product: LeadConnector
Same vendor: Unknown

V. Comments for CVE-2026-1890

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