Vulnerability · Published Mar 10, 2021 · Assigned by apache

CVE-2020-13936Velocity Sandbox Bypass

High 8.8

In plain English

A high-severity security flaw in Apache Velocity Engine from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 22.7% (higher than 98% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High
Exploit odds (30 days)22.7%top 2.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12velocity1.7-6DEBIAN-CVE-2020-13936
Debian:13velocity1.7-6DEBIAN-CVE-2020-13936
Debian:14velocity1.7-6DEBIAN-CVE-2020-13936
Mavenorg.apache.velocity:velocityno fix listedGHSA-59j4-wjwp-mw9m
Mavenorg.apache.velocity:velocity-engine-parent2.3GHSA-59j4-wjwp-mw9m

Affected products (as reported)

VendorProductVersions
Apache Software Foundation Apache Velocity Engine Apache Velocity Engine – through 2.2

References