CVE-2023-47635: decidim SSRF — Fix

Description

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.

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CVSS v3.1 Score

4.5

MEDIUM

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

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

CWE-352 Cross-Site Request Forgery

Affected Products

Vendor	Product	Versions
decidim	decidim	0.23.0 — 0.27.5

References

Advisories & Patches

https://github.com/decidim/decidim/commit/5542227be66e3b6d7530f5b536069bce09376660 https://github.com/decidim/decidim/commit/57a4b467787448307b5d9b01ce6e2c8502e121ac https://github.com/decidim/decidim/security/advisories/GHSA-f3qm-vfc3-jg6v https://github.com/decidim/decidim/commit/5542227be66e3b6d7530f5b536069bce09376660 https://github.com/decidim/decidim/commit/57a4b467787448307b5d9b01ce6e2c8502e121ac https://github.com/decidim/decidim/security/advisories/GHSA-f3qm-vfc3-jg6v

Other References

Frequently Asked Questions

What is CVE-2023-47635? +

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. It has a CVSS v3.1 base score of 4.5 (MEDIUM).

How severe is CVE-2023-47635? +

CVE-2023-47635 has a CVSS v3.1 score of 4.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-47635? +

CVE-2023-47635 affects products from decidim, specifically: decidim. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-47635? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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