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TI-2026-70466 Aliases CVE-2026-87760GHSA-pwvc-4967-h5ch

Stored cross-site scripting in Web Vitals Tracking WordPress plugin

Priority MEDIUM 40CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

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. This is a cross-site scripting flaw (CWE-79). An unauthenticated remote attacker can store script that runs in the browsers of administrators. The references link to an exploit.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0034 27th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownWeb Vitals Trackingup to 5.4.2—No fix listedCNA
  • Web Vitals Tracking VendorUnknown Affected up to 5.4.2 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Web Vitals Tracking.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-11 Threatist record created from CVE-2026-87760
  2. 2026-10-11 Alias added: GHSA-pwvc-4967-h5ch
  3. 2026-10-12 Priority changed: LOW → MEDIUM

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences