CVE-2023-47635: Decidim vulnerable to possible CSRF attack at questionnaire templates preview
Impact The CSRF authenticity token check is currently disabled for the questionnaire templates preview as per: https://github.com/decidim/decidim/blob/3187bdfd40ea1c57c2c12512b09a7fec0b2bed08/decidim-templates/app/controllers/decidim/templates/admin/questionnairetemplatescontroller.rb#L11
This was introduced by this commit in the PR that introduced this feature (#6247): https://github.com/decidim/decidim/pull/6247/commits/5542227be66e3b6d7530f5b536069bce09376660
The issue does not imply a serious security thread as you need to have access also to the session cookie in order to see this resource. This URL does not allow modifying the resource but it may allow attackers to gain access to information which was not meant to be public.
Patches #11743
Workarounds Disable the templates functionality or remove all available templates.
References #11743
Other sources
Decidim is a participatory democracy framework. Starting in version 0.23.0 and prior to versions 0.27.5 and 0.28.0, the CSRF authenticity token check is disabled for the questionnaire templates preview. The issue does not imply a serious security thread as you need to have access also to the session cookie in order to see this resource. This URL does not allow modifying the resource but it may allow attackers to gain access to information which was not meant to be public. The issue is fixed in version 0.27.5 and 0.28.0. As a workaround, disable the templates functionality or remove all available templates.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2023-47635?
CVE-2023-47635 is classified as a medium severity vulnerability due to the lack of CSRF protection in the questionnaire templates preview.
How do I fix CVE-2023-47635?
To fix CVE-2023-47635, you should update the decidim-templates package to a version beyond 0.27.5.
What are the affected versions of CVE-2023-47635?
The affected versions of CVE-2023-47635 include decidim-templates versions between 0.23.0 and 0.27.5.
What type of vulnerability is CVE-2023-47635?
CVE-2023-47635 is a Cross-Site Request Forgery (CSRF) vulnerability due to a disabled authenticity token check.
Which software is impacted by CVE-2023-47635?
CVE-2023-47635 impacts the decidim framework, specifically the decidim-templates package.