What’s Vulnerable › Vulnerabilities

CVE-2023-47634: Decidim has race condition in Endorsements

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-29 · updated 2026-06-17
• Weakness: CWE-362

Description

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: from 0.10.0 before 0.26.9; from 0.27.0 before 0.27.5 — fixed in 0.26.9, 0.27.5

How to fix

Upgrade to a fixed version: decidim 0.26.9, 0.27.5. Check the vendor advisory for mitigations.

References

• https://github.com/decidim/decidim/releases/tag/v0.26.9
• https://github.com/decidim/decidim/releases/tag/v0.27.5
• https://github.com/decidim/decidim/releases/tag/v0.28.0
• https://github.com/decidim/decidim/security/advisories/GHSA-r275-j57c-7mf2
• https://github.com/decidim/decidim/releases/tag/v0.26.9
• https://github.com/decidim/decidim/releases/tag/v0.27.5
• https://github.com/decidim/decidim/releases/tag/v0.28.0
• https://github.com/decidim/decidim/security/advisories/GHSA-r275-j57c-7mf2

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