WordPress plugin
Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 3 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical1
- High2
- Medium0
- Low0
All Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High8.1 | Unauthenticated Local File Inclusion <2.17.2Update to 2.17.2 | CVE-2026-107508 | |
| High7.3 | Unauthenticated Arbitrary Account Takeover ≤2.16.0Update to 2.17.0 | CVE-2026-103646 | |
| Critical9.8 | Unauthenticated Authentication Bypass via 'checkout_form' Parameter ≤2.15.0Update to 2.15.1 | CVE-2026-75957 |
- High8.1Unauthenticated Local File Inclusion
<2.17.2Update to 2.17.2
- High7.3Unauthenticated Arbitrary Account Takeover
≤2.16.0Update to 2.17.0
- Critical9.8Unauthenticated Authentication Bypass via 'checkout_form' Parameter
≤2.15.0Update to 2.15.1
Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform: common questions
Does Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform have known vulnerabilities?
Yes. VulnCrest Radar lists 3 known vulnerabilities in Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform: 1 critical, 2 high. None are known to affect version null.
How do I check which version of Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform vulnerability?
CVE-2026-107508, published Oct 14, 2026: Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform < 2.17.2 - Unauthenticated Local File Inclusion. Severity: High (CVSS 8.1).
Is any Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform vulnerability listed in CISA KEV?
No. None of the known Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform vulnerabilities is currently listed in the CISA KEV catalog.