Is CVE-2026-28228 actively exploited?

No active exploitation of CVE-2026-28228 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-28228 be exploited remotely?

Yes. CVE-2026-28228 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-28228?

CVE-2026-28228 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-28228

HIGH

CVE-2026-28228

CWE-1336Published: March 30, 2026· Updated: Apr 2, 2026

8.8

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-28228 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.