Vulnerability · Published Oct 11, 2026 · Assigned by WPScan
CVE-2026-87760Web Vitals Tracking <= 5.4.2 - Unauthenticated Stored XSS via Tracking Beacon Metric Name
High 8.8
In plain English
A high-severity cross-site scripting in Web Vitals Tracking from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.3%top 72.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The Web Vitals Tracking WordPress plugin through 5.4.2 does not validate or escape performance measurements submitted by unauthenticated visitors before storing them and outputting them in a script context on an administrative page, allowing unauthenticated attackers to perform Stored Cross-Site Scripting attacks against administrators.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Web Vitals Tracking | 0 – through 5.4.2 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://wpscan.com/vulnerability/c6250c43-42c5-4c76-9eb9-2b35ba461e8c/ exploit, vdb-entry, technical-description