CVE-2023-47634: Decidim

Low severity, CVSS 3.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Decidim is a participatory democracy framework. Starting in version 0.10.0 and prior to versions 0.26.9, 0.27.5, and 0.28.0, a race condition in the endorsement of resources (for instance, a proposal) allows a user to make more than once endorsement. To exploit this vulnerability, the request to set an endorsement must be sent several times in parallel. Versions 0.26.9, 0.27.5, and 0.28.0 contain a patch for this issue. As a workaround, disable the Endorsement feature in the components.

Affected products

• Decidim Decidim: from 0.10.0, before 0.26.9 (fixed in 0.26.9); from 0.27.0, before 0.27.5 (fixed in 0.27.5)

Published 2024-02-29. Last modified 2026-06-17.