CVE-2026-89424
Received Received - Intake

Stored XSS in Duplicate Post WordPress Plugin

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: Wordfence

Description
The Duplicate Post plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'noti_token' parameter in all versions up to, and including, 1.5.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires that the site owner has enabled the plugin's User Level Permissions for the Subscriber role, as this grants access to the i_saw_this_noti AJAX branch needed to deliver the payload.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-89424
EUVD
EUVD-2026-90573

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wpengine duplicate_post to 1.5.6 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the Duplicate Post WordPress plugin up to version 1.5.6. It occurs due to insufficient input sanitization and output escaping in the 'noti_token' parameter. Authenticated attackers with subscriber-level access or higher can inject malicious scripts into pages. These scripts execute when users visit the compromised pages.

Detection Guidance

To detect this vulnerability, inspect WordPress sites using the Duplicate Post plugin versions up to 1.5.6. Check for suspicious scripts in pages, especially those injected via the 'noti_token' parameter. Review user roles with subscriber-level access or higher for unauthorized AJAX calls to the i_saw_this_noti branch.

Impact Analysis

An attacker could steal user sessions, redirect users to malicious sites, or perform actions on their behalf. If the site owner enabled User Level Permissions for Subscribers, the attack is possible. The injected scripts run whenever users access the affected pages, potentially compromising user data or site integrity.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles or HIPAA's security requirements. If exploited, it may result in data breaches, requiring notifications to authorities and affected users, and potential fines under these regulations.

Mitigation Strategies

Immediately update the Duplicate Post plugin to the latest version beyond 1.5.6 to patch the vulnerability. If updating is not possible, consider disabling or removing the plugin entirely. Ensure User Level Permissions for the Subscriber role are disabled to prevent exploitation.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-89424. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart