# CVE-2020-13959: libvelocity-tools-java: The default error page for VelocityView in Apache Velocity Tools prior to 3.1 reflects back the vm file that was ente...

CVE-2020-13959 is fixed in libvelocity-tools-java on 1 platform, first by libvelocity-tools-java 2.0-7ubuntu0.18.04.1~esm1, released March 10, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-13959
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0570
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 10, 2021

## Description

The default error page for VelocityView in Apache Velocity Tools prior to 3.1 reflects back the vm file that was entered as part of the URL. An attacker can set an XSS payload file as this vm file in the URL which results in this payload being executed. XSS vulnerabilities allow attackers to execute arbitrary JavaScript in the context of the attacked website and the attacked user. This can be abused to steal session cookies, perform requests in the name of the victim or for phishing attacks.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libvelocity-tools-java Ubuntu 18.04.6 LTS (bionic) | 2.0-7ubuntu0.18.04.1~esm1 | [libvelocity-tools-java 2.0-7ubuntu0.18.04.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libvelocity-tools-java-2.0-7ubuntu0.18.04.1-esm1.md) | Mar 10, 2021 |
| Linux | libvelocity-tools-java Ubuntu 20.04 LTS (focal) | 2.0-7ubuntu0.20.04.1 | [libvelocity-tools-java 2.0-7ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libvelocity-tools-java-2.0-7ubuntu0.20.04.1.md) | Mar 10, 2021 |

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