File Inclusion Vulnerability in Ultimate Multisite WordPress Plugin by WP-DevArt
CVE-2026-107508

Currently unrated

Key Information:

Vendor

WordPress
Status
Ultimate Multisite
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-107508?

The Ultimate Multisite plugin for WordPress, versions prior to 2.17.2, is susceptible to a file inclusion vulnerability that allows unauthenticated users to include and read arbitrary files on the server. This issue arises from the plugin's failure to properly validate user-supplied input utilized for selecting files. Consequently, attackers could exploit this weakness to access restricted files, such as configuration data, potentially leading to unauthorized data exposure and further exploitation of the site.

Affected Version(s)

Ultimate Multisite 0 < 2.17.2

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-2026-107508 - Proof of Concept

References

https://wpscan.com/vulnerability/2b2808d3-b3fc-41d4-8be5-...
exploitvdb-entrytechnical-description

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

hanzzly (Farhan Auliya Abrar)
WPScan
.