What is CVE-2026-87760?

CVE-2026-87760 is a high-severity vulnerability in Web Vitals Tracking, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-10-11.

How severe is CVE-2026-87760?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in Web Vitals Tracking

CVE-2026-87760

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-11 · last modified 2026-10-11.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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

Web Vitals Tracking

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

wpscan.com/vulnerability/c6250c43-42c5-4c76-9eb9-2b35ba461e8c/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-87760?: CVE-2026-87760 is a high-severity vulnerability in Web Vitals Tracking, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-10-11.
How severe is CVE-2026-87760?: High severity. CVSS v3 base score is 8.8 out of 10.