CVE-2026-87760

HIGHCVSS 8.8/10EPSS 0.34%

Last modified

CVE-2026-87760 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.34%

25.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
UnknownWeb Vitals Tracking<= 5.4.2

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-87760?
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.
How severe is CVE-2026-87760?
CVE-2026-87760 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2026-87760?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST