CVE-2026-57671 HIGH

CVE-2026-57671: WordPress perfmatters plugin <= 2.6.4 - Cross Site Scripting (XSS) vulnerability

Vendor Perfmatters
Product perfmatters
Weakness CWE-79 · XSS
Published July 2, 2026
Last update July 2, 2026
View on NVD All CVEs

CVSS base score

7.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Unauthenticated Cross Site Scripting (XSS) in perfmatters <= 2.6.4 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Perfmatters versions up to 2.6.4 contain a cross-site scripting (XSS) vulnerability that allows an attacker to inject malicious scripts into the site. The vulnerability requires user interaction—typically a victim clicking a malicious link—and can affect multiple users or site functionality. An attacker with no authentication can craft a payload that executes in the browser of anyone who visits the affected page.

What an attacker can do

03Attacker Capabilities

Inject malicious JavaScript that runs in visitors' browsers, potentially stealing session tokens or redirecting users.

Potential impact on your site

04Site Impact

Visitors to your site could be redirected, have their sessions hijacked, or see defaced content without your knowledge.

Conditions required to exploit

05Prerequisites

Victim must click a malicious link or visit an attacker-controlled page; no authentication required.

Key dates

06Disclosure timeline

July 2, 2026 CVE published