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.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
| Link | Tags |
|---|---|
| https://github.com/decidim/decidim/security/advisories/GHSA-r275-j57c-7mf2 | vendor advisory |
| https://github.com/decidim/decidim/releases/tag/v0.26.9 | release notes |
| https://github.com/decidim/decidim/releases/tag/v0.27.5 | release notes |
| https://github.com/decidim/decidim/releases/tag/v0.28.0 | release notes |