Decidim is a participatory democracy framework. Prior to 0.32.0, a low-privilege process-scoped administrator or election editor with question-management rights can store HTML or script-bearing content in question.body. The question_title helper returns the translatable question body through html_safe without a sanitization boundary, causing stored script execution when visitors open public election pages or voting booth screens. The persisted script executes in visitors' browsers. The vulnerability is fixed in 0.32.0.
https://github.com/decidim/decidim/security/advisories/GHSA-9mvp-w4rr-5c6x
https://github.com/decidim/decidim/releases/tag/v0.32.0
https://github.com/decidim/decidim/pull/16669
https://github.com/decidim/decidim/pull/16659
https://github.com/decidim/decidim/commit/b6e1b003365d10c0df2bc7edc5edd26b62fafda1
https://github.com/decidim/decidim/commit/64dbea3739f360f1eb36932dfc49d9686e61fc00