What’s Vulnerable › Vulnerabilities
CVE-2026-87760: Web Vitals Tracking <= 5.4.2 - Unauthenticated Stored XSS via Tracking Beacon Metric Name
- Severity: high (CVSS 8.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-11 · updated 2026-10-13
- Weakness: CWE-79
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
- Web Vitals Tracking: through 5.4.2
References
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