CVE-2026-87760 Web Vitals Tracking WordPress - Stored XSS

Web Vitals Tracking WordPress plugin through 5.4.2 contains a stored cross-site scripting caused by lack of validation and escaping of performance measurements submitted by unauthenticated visitors, letting unauthenticated attackers execute scripts in admin pages, exploit requires no authentication.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to the latest version beyond 5.4.2.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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