medium
5.4
CWE
79
EPSS
0.043%
Advisory Published
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2024-34064: Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter

First published: Mon May 06 2024(Updated: )

Jinja is an extensible templating engine. The `xmlattr` filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, `/`, `>`, or `=`, as each would then be interpreted as starting a separate attribute. If an application accepts keys (as opposed to only values) as user input, and renders these in pages that other users see as well, an attacker could use this to inject other attributes and perform XSS. The fix for CVE-2024-22195 only addressed spaces but not other characters. Accepting keys as user input is now explicitly considered an unintended use case of the `xmlattr` filter, and code that does so without otherwise validating the input should be flagged as insecure, regardless of Jinja version. Accepting _values_ as user input continues to be safe. This vulnerability is fixed in 3.1.4.

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
ubuntu/jinja2<2.10-1ubuntu0.18.04.1+
2.10-1ubuntu0.18.04.1+
ubuntu/jinja2<2.10.1-2ubuntu0.3
2.10.1-2ubuntu0.3
ubuntu/jinja2<3.0.3-1ubuntu0.2
3.0.3-1ubuntu0.2
ubuntu/jinja2<3.1.2-1ubuntu0.23.10.2
3.1.2-1ubuntu0.23.10.2
ubuntu/jinja2<3.1.2-1ubuntu1.1
3.1.2-1ubuntu1.1
ubuntu/jinja2<2.7.2-2ubuntu0.1~
2.7.2-2ubuntu0.1~
ubuntu/jinja2<3.1.4
3.1.4
ubuntu/jinja2<2.8-1ubuntu0.1+
2.8-1ubuntu0.1+
pip/Jinja2<3.1.4
3.1.4
debian/jinja2<=2.11.3-1<=3.1.2-1<=3.1.3-1
F5 Traffix Systems Signaling Delivery Controller=5.1.0
5.2.0
redhat/jinja2<3.1.4
3.1.4
IBM Rational Team Concert<=1.0.0, 1.0.1, 1.0.2, 1.0.2.1, 1.0.3

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-34064?

    CVE-2024-34064 has been assigned a vulnerability severity that indicates potential risks related to the xmlattr filter in Jinja.

  • How do I fix CVE-2024-34064?

    To fix CVE-2024-34064, upgrade to the patched versions of Jinja listed in the affected software section.

  • Which versions of Jinja are affected by CVE-2024-34064?

    Versions of Jinja prior to 2.11.4 and 3.1.4 are affected by CVE-2024-34064.

  • What does CVE-2024-34064 weaken in Jinja?

    CVE-2024-34064 weakens the security by allowing keys with non-attribute characters in XML/HTML attributes.

  • Is my deployment vulnerable to CVE-2024-34064?

    If you are using affected versions of Jinja, your deployment is vulnerable to CVE-2024-34064 and should be updated immediately.

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