CVE-2024-34064

Aliases:GHSA-h75v-3vvj-5mfj
Advisory lineage Upstream: 0 Downstream: 28
Modified
Published: 06 May 2024, 14:41
Last modified:03 Nov 2025, 21:54

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.4 MEDIUM
v3.1 (cve.org)
EPSS Score
1.23% LOW
1% probability +0.08%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 May 2024, 14:41
Published
Vulnerability first disclosed
03 Nov 2025, 21:54
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS Trends

Current EPSS score: 1.23%• Percentile: 80%

Techniques & Countermeasures

  • CWE-79•Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

    The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Affected Systems

  • fedoraproject•fedora

    39 | 40

  • pallets•jinja

    < 3.1.4

  • palletsprojects•jinja

    < 3.1.4

  • PyPI•jinja2

    < 3.1.4

References (13)