CVE-2023-47821: Onlineoptimisation Email Encoder

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jannis Thuemmig Email Encoder plugin <= 2.1.8 versions.

Affected products

• Onlineoptimisation Email Encoder: up to and including 2.1.8

Published 2023-11-22. Last modified 2026-07-22.