Velocity Sandbox Bypass

Summary

An attacker that is able to modify Velocity templates may execute arbitrary Java code or run arbitrary system commands with the same privileges as the account running the Servlet container. This applies to applications that allow untrusted users to upload/modify velocity templates running Apache Velocity Engine versions up to 2.2.

Timeline

1. Mar 10, 2021, 8:00 AM UTCCVE published
2. Feb 13, 2025, 4:27 PM UTCRecord last updated
3. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Apache Software Foundation Apache Velocity Engine

  through 2.2

• org.apache.velocity:velocity-engine-parentMaven

  fixed in 2.3

• org.apache.velocity:velocityMaven

  through 1.7

References 23