Decidim is a participatory democracy framework. Prior to 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the GET /admin/organization/users search interpolates params[:term] into raw Arel.sql ORDER BY similarity expressions before sanitization, allowing an authenticated organization administrator to execute blind PostgreSQL expressions and infer data through timing differences. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.
https://github.com/decidim/decidim/security/advisories/GHSA-jvqq-cvh4-xm37
https://github.com/decidim/decidim/releases/tag/v0.32.0.rc2
https://github.com/decidim/decidim/releases/tag/v0.31.5
https://github.com/decidim/decidim/releases/tag/v0.30.9
https://github.com/decidim/decidim/commit/f3817fac448a4e3facd6bcb346167048b3421124
https://github.com/decidim/decidim/commit/e4d21b41fb462d9436035a043962a4090f2cc240
https://github.com/decidim/decidim/commit/27335957b363516e23919a9006812f1c458c88e0