CVE-2026-107508

Deferred Deferred - Pending Action

Unauthenticated Local File Inclusion in Ultimate Multisite WordPress Plugin

Publication date: 2026-10-14

Last updated on: 2026-10-14

Assigner: WPScan

Description

The Ultimate Multisite WordPress plugin before 2.17.2 does not validate a user-supplied value used to select a file to include, allowing unauthenticated attackers to include and read arbitrary local files, including the WordPress configuration file.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-14

Last Modified

2026-10-14

Generated

2026-10-19

AI Q&A

2026-10-15

EPSS Evaluated

2026-10-18

NVD

CVE-2026-107508

EUVD

EUVD-2026-100892

Affected Vendors & Products

Vendor	Product	Version / Range
Unknown	Ultimate	Multisite 0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

Executive Summary

This is an unauthenticated Local File Inclusion (LFI) vulnerability in the Ultimate Multisite WordPress plugin before version 2.17.2. The plugin fails to validate user input in the 'attributes' parameter, allowing attackers to include and read arbitrary local files on the server, including sensitive files like the WordPress configuration file.

Detection Guidance

To detect this vulnerability, check if the Ultimate Multisite WordPress plugin is installed and verify its version. If the version is below 2.17.2, the system is vulnerable. Use commands like 'wp plugin list' in WordPress CLI or inspect the plugin files directly.

Impact Analysis

An attacker could exploit this to read sensitive files on your server, such as the WordPress configuration file, which may contain database credentials and other critical information. This could lead to further compromise of your WordPress site or server.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating GDPR (if personal data is exposed) or HIPAA (if protected health information is compromised). Non-compliance with these regulations may result in legal penalties and reputational damage.

Mitigation Strategies

Immediately update the Ultimate Multisite plugin to version 2.17.2 or later. If updating is not possible, consider disabling or removing the plugin until a patch is applied. Monitor for suspicious activity or unauthorized file access.

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