WordPress plugin
User Session Synchronizer security & vulnerabilities
Unpatched vulnerability in the latest version
At least one vulnerability affects the latest version and no fix has been released. Deactivate the plugin or restrict access to the affected feature until the vendor ships a patch.
- Critical1
- High0
- Medium1
- Low0
All User Session Synchronizer vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Critical9.8 | Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters ≤1.4.0No patch available | CVE-2026-15341 |
- Critical9.8Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters
≤1.4.0No patch available
User Session Synchronizer: common questions
Does User Session Synchronizer have known vulnerabilities?
Yes. VulnCrest Radar lists 2 known vulnerabilities in User Session Synchronizer: 1 critical, 1 medium. At least one is not fixed in the latest version.
How do I check which version of User Session Synchronizer 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 User Session Synchronizer vulnerability?
CVE-2026-15341, published Aug 14, 2026: User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters. Severity: Critical (CVSS 9.8).
Is any User Session Synchronizer vulnerability listed in CISA KEV?
No. None of the known User Session Synchronizer vulnerabilities is currently listed in the CISA KEV catalog.