---
id: CVE-2026-87760
title: >-
  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, allo…
summary: >-
  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, allo…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-79
published: '2026-10-11'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T20:36:00.850'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87760'
references:
  - url: 'https://wpscan.com/vulnerability/c6250c43-42c5-4c76-9eb9-2b35ba461e8c/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
epss: 0.0034
epssPercentile: 0.27304
ingestedAt: '2026-10-11T08:44:24.722Z'
product: Web Vitals Tracking
affected:
  - web_vitals_tracking <= 5.4.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-11T11:22:54.651605Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.