# CVE-2026-78278: Fluent Boards Pro insecure direct object references (IDOR) in subscriber endpoints

Source: https://junglewise.ai/threats/cve-2026-78278-fluent-boards-pro-insecure-direct-object-references-idor-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-24. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-78278 · Severity: medium · CVSS 5.3 · Published 2026-08-24

Fluent Boards Pro is a WordPress plugin used for building community discussion boards and managing user interactions. A flaw allows logged-in users with subscriber-level privileges to access and view other users' private data by manipulating object IDs in URLs, potentially exposing personal information and board content that should remain restricted.

Technologies: [WP ManageNinja Fluent Boards Pro](https://junglewise.ai/threats/technologies/fluent-boards-pro). Vendors: [WP ManageNinja](https://junglewise.ai/threats/vendors/wp-manageninja).

## Quick answers

**Is CVE-2026-78278 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78278 being exploited in the wild.

**How severe is CVE-2026-78278?** Medium severity, with a CVSS score of 5.3, published 24 August 2026.

**Which products and versions are affected?** WP ManageNinja Fluent Boards Pro ≤ 2.0.11.

**Is there a fix for CVE-2026-78278?** A patch was published on 2026-08-24: Patched in version 2.0.12 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-78278 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-78278?** Check whether you run WP ManageNinja Fluent Boards Pro 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.

## Technical details

The vulnerability is an Insecure Direct Object Reference (IDOR) flaw in Fluent Boards Pro versions up to 2.0.11. The issue allows an authenticated attacker with subscriber-level access to access resources belonging to other users by modifying object identifiers in API requests or URLs. The attack requires valid plugin installation and an active subscriber account. An attacker can enumerate and retrieve unauthorized user data, posts, or other sensitive board content. The vulnerability has been patched in version 2.0.12.

## Affected products

- WP ManageNinja Fluent Boards Pro ≤ 2.0.11

## Timeline

- 2026-08-24: disclosed: Vulnerability published by Patchstack
- 2026-08-24: patched: Patched in version 2.0.12

## References

- [https://patchstack.com/database/wordpress/plugin/fluent-boards-pro/vulnerability/wordpress-fluent-boards-pro-plugin-2-0-11-insecure-direct-object-references-idor-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/fluent-boards-pro/vulnerability/wordpress-fluent-boards-pro-plugin-2-0-11-insecure-direct-object-references-idor-vulnerability?_s_id=cve)

## Related threats

- [WP ManageNinja Fluent Boards Pro arbitrary file deletion](https://junglewise.ai/threats/cve-2026-78275-wp-manageninja-fluent-boards-pro-arbitrary-file-deletion)
- [Fluent Boards Pro cross-site scripting (XSS) in subscriber functionality](https://junglewise.ai/threats/cve-2026-78273-fluent-boards-pro-cross-site-scripting-xss-in-subscriber)