Quick answers
- Is CVE-2026-116859 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-116859 being exploited in the wild.
- How severe is CVE-2026-116859?
- Medium severity, with a CVSS score of 5.3, published 3 November 2026.
- Which products and versions are affected?
- WPMU DEV Forminator through 1.58.3.
- Is there a fix for CVE-2026-116859?
- Yes: fixed in 1.58.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-116859 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-116859?
- Check whether you run WPMU DEV Forminator 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: 1.58.4
Technical details
The vulnerability is a broken access control issue in Forminator versions up to 1.58.3 that fails to properly restrict access to certain form operations. Unauthenticated attackers can exploit incorrectly configured access control to view or modify form data and perform unauthorized actions. The vulnerability requires network access but no authentication or user interaction beyond crafting a malicious request.
Affected products
- WPMU DEV Forminator through 1.58.3
Timeline
- 2026-10-16: disclosed
- 2026-11-03: advisory