jinja2: CVE-2024-22195: HTML attribute injection when passing user input as keys to xmlattr filter

Debian Bug report logs - #1060748
jinja2: CVE-2024-22195: HTML attribute injection when passing user input as keys to xmlattr filter

Reply or subscribe to this bug.

Toggle useless messages

Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Salvatore Bonaccorso <carnil@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: jinja2: CVE-2024-22195: HTML attribute injection when passing user input as keys to xmlattr filter

Date: Sat, 13 Jan 2024 17:25:25 +0100

Source: jinja2
Version: 3.1.2-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for jinja2.

CVE-2024-22195[0]:
| Jinja is an extensible templating engine. Special placeholders in
| the template allow writing code similar to Python syntax. It is
| possible to inject arbitrary HTML attributes into the rendered HTML
| template, potentially leading to Cross-Site Scripting (XSS). The
| Jinja `xmlattr` filter can be abused to inject arbitrary HTML
| attribute keys and values, bypassing the auto escaping mechanism and
| potentially leading to XSS. It may also be possible to bypass
| attribute validation checks if they are blacklist-based.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2024-22195
    https://www.cve.org/CVERecord?id=CVE-2024-22195
[1] https://github.com/pallets/jinja/security/advisories/GHSA-h5c8-rqwp-cp95
[2] https://github.com/pallets/jinja/commit/7dd3680e6eea0d77fde024763657aa4d884ddb23

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

Send a report that this bug log contains spam.