# CVE-2026-39444: PublishPress Series insecure direct object reference in organize-series

Source: https://junglewise.ai/threats/cve-2026-39444-authorization-bypass-through-user-controlled-key-vulnerability-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-02. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-39444 · Severity: medium · CVSS 5.4 · Published 2026-10-02

PublishPress Series is a WordPress plugin that helps organize and manage content series on websites. An insecure direct object reference vulnerability in the organize-series component allows attackers with Contributor or Developer privileges to access and potentially modify other users' data by manipulating URL parameters. This could lead to unauthorized exposure of sensitive content or data tampering.

Technologies: [PublishPress Series](https://junglewise.ai/threats/technologies/series). Vendors: [PublishPress](https://junglewise.ai/threats/vendors/publishpress).

## Quick answers

**Is CVE-2026-39444 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39444 being exploited in the wild.

**How severe is CVE-2026-39444?** Medium severity, with a CVSS score of 5.4, published 2 October 2026.

**Which products and versions are affected?** PublishPress Series through 3.1.3.

**Is there a fix for CVE-2026-39444?** Yes: fixed in 3.1.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39444 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-39444?** Check whether you run PublishPress Series at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.1.4

## Technical details

An insecure direct object reference (IDOR) vulnerability exists in the organize-series functionality, allowing authenticated users with Contributor or Developer roles to access objects belonging to other users by directly manipulating object identifiers in requests. The vulnerability requires authentication and valid user credentials to exploit. Attackers can bypass access controls to view or modify unauthorized resources, though the impact is considered low severity.

## Affected products

- PublishPress Series through 3.1.3

## Timeline

- 2026-10-02: disclosed

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/organize-series/vulnerability/wordpress-publishpress-series-plugin-3-1-3-insecure-direct-object-references-idor-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/organize-series/vulnerability/wordpress-publishpress-series-plugin-3-1-3-insecure-direct-object-references-idor-vulnerability?_s_id=cve)

## Related threats

- [PublishPress Series unauthenticated cross-site request forgery](https://junglewise.ai/threats/cve-2026-74005-publishpress-series-unauthenticated-cross-site-request-forgery)
- [PublishPress Series SQL Injection in administrator panel](https://junglewise.ai/threats/cve-2026-66630-publishpress-series-sql-injection-in-administrator-panel)
- [PublishPress Series Cross-Site Scripting (XSS) in plugin](https://junglewise.ai/threats/cve-2026-66617-publishpress-series-cross-site-scripting-xss-in-plugin)