github.com
https://github.com/decidim/decidim CVE-2026-45572
MEDIUM
Decidim: HTML content blocks allow stored script execution
Record summary
CVE-2026-45572 has a selected CVSS score of 4.8 (medium).
Description
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, 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.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableNo
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 7, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
decidimBrowse decidim / decidim | CVE List | < 0.30.9 | affected |
| >= 0.31.0.rc1, < 0.31.5 | affected | ||
| >= 0.32.0.rc1, < 0.32.0 | affected | ||
decidim-coreBrowse RubyGems / decidim-core | GitHub Advisory | Before 0.30.9 · Fixed in 0.30.9 | affected |
| 0.31.0.rc1 to < 0.31.5 · Fixed in 0.31.5 | affected | ||
| 0.32.0.rc1 to < 0.32.0 · Fixed in 0.32.0 | affected |
References
3github.com
https://github.com/decidim/decidim/pull/16451 github.comConfirmation
https://github.com/decidim/decidim/security/advisories/GHSA-533c-2vh9-4r86