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Possible CSRF attack at questionnaire templates preview

Moderate severity GitHub Reviewed Published Feb 20, 2024 in decidim/decidim • Updated Feb 20, 2024

Package

bundler decidim-templates (RubyGems)

Affected versions

>= 0.23.0, < 0.27.5

Patched versions

0.27.5

Description

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/questionnaire_templates_controller.rb#L11

This was introduced by this commit in the PR that introduced this feature (#6247):
decidim/decidim@5542227

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

References

@andreslucena andreslucena published to decidim/decidim Feb 20, 2024
Published to the GitHub Advisory Database Feb 20, 2024
Reviewed Feb 20, 2024
Published by the National Vulnerability Database Feb 20, 2024
Last updated Feb 20, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

EPSS score

0.084%
(38th percentile)

Weaknesses

CVE ID

CVE-2023-47635

GHSA ID

GHSA-f3qm-vfc3-jg6v

Source code

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