Unauthorized Data Modification in LeadConnector Plugin by LeadConnector
CVE-2026-1890

5.3MEDIUM

Key Information:

Vendor

WordPress
Status
Leadconnector
Vendor
CVE Published:
26 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1890?

The LeadConnector WordPress plugin prior to version 3.0.22 contains a security vulnerability that allows unauthenticated users to access a REST route, enabling them to overwrite existing data. This oversight in authorization can lead to unauthorized data manipulation, posing a significant risk to the integrity of user data. Site administrators should update to the latest version to mitigate this risk.

Affected Version(s)

LeadConnector 0 < 3.0.22

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-1890 - Proof of Concept

References

https://wpscan.com/vulnerability/9b88be70-b5cc-4a3f-a871-...
exploitvdb-entrytechnical-description

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

yiğit ibrahim sağlam
WPScan
.