MajorCritical vulnerability

CVE-2026-87760 (CVSS 8.8)

NVD · officialPublished Oct 11, 2026Risk 37/100EPSS 0.2%

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.

Technical details

CVSS

8.8

AV:NetworkAC:LowPR:NoneUI:RequiredC:HighI:HighA:High

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

Open primary source