CVE-2026-39444
Received Received - Intake

Authorization Bypass in PublishPress Series Plugin

Publication date: 2026-10-02

Last updated on: 2026-10-02

Assigner: Patchstack

Description
Authorization Bypass Through User-Controlled Key vulnerability in PublishPress PublishPress Series organize-series allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects PublishPress Series: from n/a through 3.1.3.

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Meta Information

Published
2026-10-02
Last Modified
2026-10-02
Generated
2026-10-02
AI Q&A
2026-10-02
EPSS Evaluated
N/A
NVD
CVE-2026-39444
EUVD
EUVD-2026-91662

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
publishpress publishpress_series From 3.0.0 (inc) to 3.1.3 (inc)
publishpress publishpress_series to 3.1.3 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

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Executive Summary

This vulnerability is an Authorization Bypass Through User-Controlled Key issue in the PublishPress Series plugin. It allows attackers to manipulate IDs in URLs to access other users' data without proper authorization. The flaw exists due to incorrectly configured access control security levels in versions up to 3.1.3.

Detection Guidance

Check if the PublishPress Series plugin version is 3.1.3 or below. Inspect network traffic for ID manipulation in URLs, such as changing numeric IDs to access unauthorized data. Review server logs for unusual access patterns or requests targeting user data.

Impact Analysis

An attacker with contributor-level access could exploit this to view or modify data belonging to other users. This may lead to unauthorized access to sensitive information, data leaks, or unintended changes in the WordPress site's content or settings.

Compliance Impact

This vulnerability could lead to unauthorized data access, potentially violating GDPR's data protection requirements or HIPAA's safeguards for protected health information. Organizations may face compliance violations, legal penalties, or reputational damage if exploited.

Mitigation Strategies

Update the PublishPress Series plugin to version 3.1.4 or later immediately. If updating is not possible, disable the plugin temporarily or restrict access to contributor-level users. Enable auto-updates for the plugin if available.

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