CVE-2026-95528
Deferred Deferred - Pending Action

Unauthenticated XSS in Core Web Vitals & PageSpeed Booster

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in Core Web Vitals & PageSpeed Booster <= 1.0.31 versions.

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-24
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-95528
EUVD
EUVD-2026-85496

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
patchstack core_web_vitals to 1.0.31 (inc)
patchstack pagespeed_booster to 1.0.31 (inc)
patchstack core_web_vitals_pagespeed_booster to 1.0.31 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability affecting the WordPress Core Web Vitals & PageSpeed Booster Plugin versions 1.0.31 and below. It allows attackers to inject malicious scripts into web pages viewed by users.

Detection Guidance

Detecting this XSS vulnerability requires checking if the Core Web Vitals & PageSpeed Booster plugin version 1.0.31 or below is installed. Inspect WordPress installations for the plugin and verify its version. No specific commands are provided, but manual review of plugin files and version checks are necessary.

Impact Analysis

Attackers can exploit this to steal visitor data, hijack user accounts, or perform other malicious actions by tricking users into interacting with a crafted link or form. A privileged user must interact with the malicious input for exploitation.

Compliance Impact

This XSS vulnerability could lead to data breaches, compromising user data and potentially violating GDPR or HIPAA requirements for data protection and security.

Mitigation Strategies

Immediately update the Core Web Vitals & PageSpeed Booster plugin to version 1.0.32 or later. If updating is not possible, apply Patchstack's mitigation rule to block attacks until the update is completed.

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