CVE-2026-14939: Unknown Visualizer

Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days.

The Visualizer WordPress plugin before 4.0.6 does not restrict a user-supplied URL to safe address ranges before fetching it server-side, allowing users with Contributor-level access and above to perform Server-Side Request Forgery against link-local instance-metadata endpoints. As the fetched response is returned in the reply, the attack is non-blind, enabling retrieval of cloud instance metadata (including IAM credentials) on cloud-hosted sites.

Affected products

• Unknown Visualizer: before 4.0.6 (fixed in 4.0.6)

Published 2026-08-04. Last modified 2026-08-26.