CVE-2026-45573

Prior to versions 0.30.9, 0.31.5, and 0.32.0.rc2, an administrator with landing-page editing privileges can store arbitrary HTML and JavaScript in an HTML content block, which Decidim::ContentBlocks::HtmlCell#html_content renders without sanitization, causing the script to execute in visitors' browsers. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Prior to versions 0.30.9, 0.31.5, and 0.32.0.rc2, the /admin/csv_census/census_logs record-management endpoints do not enforce full administrator authorization before rendering or mutating Decidim::Verifications::CsvDatum, allowing a participant manager to create, alter, or remove census records. This issue is fixed in versions 0.30.9, 0.31.5, and 0.32.0.rc2.

Decidim prior to version 0.31.5 and in 0.32.0.rc1 before 0.32.0.rc2, JWT-backed API authentication is not bound to the organization selected by the current host, allowing a JWT issued for one tenant to be replayed against another tenant’s API to read participantDetails data and reach the proposal.answer mutation path.

Decidim prior to version 0.30.9, from 0.31.0 before 0.31.5, and in 0.32.0.rc1 before 0.32.0.rc2, the identity-document verification admin UI embeds verification_attachment blobs through reusable signed Active Storage disk URLs, allowing anyone who obtains a URL to download the scanned document without an authenticated Decidim session until the signature expires. Verification-document images are rendered with variant_url(...), which produces signed /rails/active_storage/disk/... links instead of routing the file through an authorization-checking controller. Because Decidim configures Active Storage service URLs to remain valid for seven days, the URL itself becomes the credential for that period.

In Decidim before versions 0.30.9, 0.31.5, and 0.32.0.rc2, the download_your_data flow requires authentication but the resulting Active Storage blob redirect URL can be replayed without authentication by anyone who obtains it.

In Decidim before versions 0.30.9, 0.31.5, and 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.

In Decidim before versions 0.30.9, 0.31.5, and 0.32.0.rc2, the identity-document verification admin controllers load pending Authorization records by raw identifier without confirming current_organization ownership, allowing an administrator from one tenant to view, approve, or reject another tenant’s ID-document request.

In Decidim versions 0.31.1 through 0.31.4 and 0.32.0.rc1, a regular participant can access the demographics questionnaire editor at /admin/demographics/questions/edit_questions without required administrator authorization. The route lacks an admin permission check.