CVE-2026-84829: Unknown Optimole

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

The Optimole WordPress plugin before 4.2.12 does not properly escape a user supplied value before using it to build an image tag attribute, allowing unauthenticated users to inject arbitrary attributes into pages served to every visitor, which leads to Stored Cross-Site Scripting.

Affected products

• Unknown Optimole: from 4.2.3, before 4.2.12 (fixed in 4.2.12)

Published 2026-09-16. Last modified 2026-09-17.