PT-2026-29118 · Openolat · Openolat

Published 2026-03-30 · Updated 2026-03-30 · CVE-2026-28228

Mitre

CVSS v3.1

8.8

High

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

OpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. Prior to versions 19.1.31, 20.1.18, and 20.2.5, an authenticated user with the Author role can inject Velocity directives into a reminder email template. When the reminder is processed (either triggered manually or via the daily cron job), the injected directives are evaluated server-side. By chaining Velocity's #set directive with Java reflection, an attacker can instantiate arbitrary Java classes such as java.lang.ProcessBuilder and execute operating system commands with the privileges of the Tomcat process (typically root in containerized deployments). This issue has been patched in versions 19.1.31, 20.1.18, and 20.2.5.

Fix

Weakness Enumeration

CWE-1336

Related Identifiers

CVE-2026-28228

Affected Products

Openolat

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-28228 · Security Note
• https://github.com/OpenOLAT/OpenOLAT/security/advisories/GHSA-55qg-vvgj-ffh4 · Note