CVE-2025-39423 HIGH

CVE-2025-39423: WordPress Add to Header plugin <= 1.0 - CSRF to XSS vulnerability

Vendor Jenst

Product Add to Header

Weakness CWE-352 · CSRF

Published April 17, 2025

Last update April 28, 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

Cross-Site Request Forgery (CSRF) vulnerability in Jenst Add to Header add-to-header allows Stored XSS.This issue affects Add to Header: from n/a through <= 1.0.

Explanation of Vulnerability in Simple Terms

02Summary

Add to Header versions 1.0 and earlier contain a cross-site request forgery (CSRF) vulnerability. An attacker can craft a malicious webpage that, when visited by a logged-in site administrator, performs unwanted actions on the site without their knowledge. The vulnerability requires user interaction—the admin must visit the attacker's page while authenticated.

What an attacker can do

03Attacker Capabilities

Perform unwanted actions on the site by tricking an authenticated admin into visiting a malicious webpage.

Potential impact on your site

04Site Impact

An attacker can modify site settings or content if they trick an admin into clicking a malicious link while logged in.

Conditions required to exploit

05Prerequisites

Site admin must be logged in and visit an attacker-controlled webpage.

Key dates

06Disclosure timeline

April 17, 2025 CVE published

April 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2025-39423 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/352.html AskarLabs — CWE-352 write-up Cross-Site Request Forgery

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