CWE
79
Advisory Published

USN-6787-1: Jinja2 vulnerability

First published: Tue May 28 2024(Updated: )

It was discovered that Jinja2 incorrectly handled certain HTML attributes that were accepted by the xmlattr filter. An attacker could use this issue to inject arbitrary HTML attribute keys and values to potentially execute a cross-site scripting (XSS) attack.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/python3-jinja2<3.1.2-1ubuntu1.1
3.1.2-1ubuntu1.1
Ubuntu=24.04
All of
ubuntu/python3-jinja2<3.1.2-1ubuntu0.23.10.2
3.1.2-1ubuntu0.23.10.2
Ubuntu=23.10
All of
ubuntu/python3-jinja2<3.0.3-1ubuntu0.2
3.0.3-1ubuntu0.2
Ubuntu=22.04
All of
ubuntu/python-jinja2<2.10.1-2ubuntu0.3
2.10.1-2ubuntu0.3
Ubuntu=20.04
All of
ubuntu/python3-jinja2<2.10.1-2ubuntu0.3
2.10.1-2ubuntu0.3
Ubuntu=20.04
All of
ubuntu/python-jinja2<2.10-1ubuntu0.18.04.1+esm2
2.10-1ubuntu0.18.04.1+esm2
Ubuntu=18.04
All of
ubuntu/python3-jinja2<2.10-1ubuntu0.18.04.1+esm2
2.10-1ubuntu0.18.04.1+esm2
Ubuntu=18.04
All of
ubuntu/python-jinja2<2.8-1ubuntu0.1+esm3
2.8-1ubuntu0.1+esm3
Ubuntu=16.04
All of
ubuntu/python3-jinja2<2.8-1ubuntu0.1+esm3
2.8-1ubuntu0.1+esm3
Ubuntu=16.04
All of
ubuntu/python-jinja2<2.7.2-2ubuntu0.1~esm3
2.7.2-2ubuntu0.1~esm3
Ubuntu=14.04
All of
ubuntu/python3-jinja2<2.7.2-2ubuntu0.1~esm3
2.7.2-2ubuntu0.1~esm3
Ubuntu=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-6787-1?

    The severity of USN-6787-1 is high due to the potential for cross-site scripting (XSS) attacks.

  • How do I fix USN-6787-1?

    To fix USN-6787-1, upgrade to the appropriate remedied version of python3-jinja2 for your specific Ubuntu release.

  • Which versions of Ubuntu are affected by USN-6787-1?

    USN-6787-1 affects multiple versions of Ubuntu, including 14.04, 16.04, 18.04, 20.04, 22.04, 23.10, and 24.04.

  • What is the cause of the vulnerability in USN-6787-1?

    The vulnerability in USN-6787-1 is caused by Jinja2's improper handling of HTML attributes accepted by the xmlattr filter.

  • Is there a workaround for USN-6787-1?

    There is no recommended workaround for USN-6787-1; updating to the fixed version is necessary to mitigate the vulnerability.

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