What is CVE-2026-107508?

CVE-2026-107508 is a high-severity vulnerability in Ultimate Multisite, classified under Path Traversal. CVSS score: 8.6/10. Published 2026-10-14.

How severe is CVE-2026-107508?

High severity. CVSS v3 base score is 8.6 out of 10.

Path Traversal in Ultimate Multisite

CVE-2026-107508

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-10-14 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Ultimate Multisite

Weakness classification (CWE)

CWE-22 — Path Traversal

References

wpscan.com/vulnerability/2b2808d3-b3fc-41d4-8be5-82d222911bc6/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-107508?: CVE-2026-107508 is a high-severity vulnerability in Ultimate Multisite, classified under Path Traversal. CVSS score: 8.6/10. Published 2026-10-14.
How severe is CVE-2026-107508?: High severity. CVSS v3 base score is 8.6 out of 10.