SQL Injection Vulnerability in Fast Courier WordPress Plugin
CVE-2026-89288

Currently unrated

Key Information:

Vendor

WordPress
Status
Fast Courier
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-89288?

The Fast Courier WordPress plugin prior to version 5.2.4 is susceptible to an SQL injection vulnerability due to improper sanitization and escaping of input values in an unauthenticated REST route. This flaw allows attackers without authentication to manipulate SQL queries, potentially granting them unauthorized access to read sensitive data from the database.

Affected Version(s)

Fast Courier 5.0.0 < 5.2.4

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-2026-89288 - Proof of Concept

References

https://wpscan.com/vulnerability/8b651892-fc8a-4c8b-a04d-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Enrico Marcolini
Claudio Marchesini
Dottor Marc
WPScan
.