CVE-2024-34064 – jinja2

Package

Manager: pip
Name: jinja2
Vulnerable Version: >=0 <3.1.4

Severity

Level: Medium

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

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00197 pctl0.41837

Details

Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter 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 the previous GHSA-h5c8-rqwp-cp95 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.

Metadata

Created: 2024-05-06T14:20:59Z
Modified: 2024-06-10T18:30:57Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/05/GHSA-h75v-3vvj-5mfj/GHSA-h75v-3vvj-5mfj.json
CWE IDs: ["CWE-79"]
Alternative ID: GHSA-h75v-3vvj-5mfj
Finding: F425
Auto approve: 1