CVE-2026-87760
Web Vitals Tracking <= 5.4.2 - Unauthenticated Stored XSS via Tracking Beacon Metric Name
- State
- Published
- Severity
- 8.8 High
- Published
- Oct 11, 2026
- Updated
- Oct 11, 2026
- Reserved
- Sep 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Web Vitals TrackingUnknown |
|
References
- https://wpscan.com/vulnerability/c6250c43-42c5-4c76-9eb9-2b35ba461e8c/exploitvdb-entrytechnical-description
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