Decidim: Forms admin question editor lacks authorization
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-862.
Summary
Decidim is a participatory democracy framework. From 0.31.1 before 0.31.5 and in 0.32.0.rc1 before 0.32.0.rc2, a participant can directly load /admin/demographics/questions/edit_questions and reach the demographics questionnaire editor without the required administrator authorization. The demographics questionnaire editor should require admin access, but the route under /admin/demographics/questions renders the editor interface without checking whether the caller is an admin. A normal participant can load the page and see the live update form action, which proves the protected interface is reachable. This issue is fixed in versions 0.31.5 and 0.32.0.rc2.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| decidim | decidim | 0.31.1 to before 0.31.5; 0.32.0.rc1 to before 0.32.0.rc2 | 0.31.5, 0.32.0.rc2 | Patch available | CNA |
| — | decidim-demographics (RubyGems) | 0.31.0 to before 0.31.5 | 0.31.5 | Patch available | GHSA-vq6j-hj8w-7v39 |
| — | decidim-demographics (RubyGems) | 0.32.0.rc1 to before 0.32.0 | 0.32.0 | Patch available | GHSA-vq6j-hj8w-7v39 |
- decidim Vendordecidim Affected 0.31.1 to before 0.31.5; 0.32.0.rc1 to before 0.32.0.rc2 Fixed in 0.31.5, 0.32.0.rc2 Patch available CNA
- decidim-demographics (RubyGems) Vendor— Affected 0.31.0 to before 0.31.5 Fixed in 0.31.5 Patch available GHSA-vq6j-hj8w-7v39
- decidim-demographics (RubyGems) Vendor— Affected 0.32.0.rc1 to before 0.32.0 Fixed in 0.32.0 Patch available GHSA-vq6j-hj8w-7v39
Remediation
- Fix · CNA decidim (decidim) Fixed in 0.31.5, 0.32.0.rc2
- Fix · GHSA-vq6j-hj8w-7v39 decidim-demographics (RubyGems) Fixed in 0.31.5 Advisory →
- Fix · GHSA-vq6j-hj8w-7v39 decidim-demographics (RubyGems) Fixed in 0.32.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-45086
- 2026-10-03 Alias added: GHSA-vq6j-hj8w-7v39
References
Other 5
- https://github.com/decidim/decidim/security/advisories/GHSA-vq6j-hj8w-7v39
- https://github.com/decidim/decidim/commit/fa52fb631a0788b30895d1312728a888607d81b5
- https://github.com/decidim/decidim/commit/fc89301c6697c6101a7aed3fced3fa8311048cb9
- https://github.com/decidim/decidim/pull/16665
- https://github.com/decidim/decidim
More decidim vulnerabilities
- TI-2026-33169 Decidim: Verification documents can be downloaded through reusable links CVSS 3.1HIGH 7.5
- TI-2025-40203 Decidim's private data exports can lead to data leaks CVSS 4.0HIGH 8.2
- TI-2026-33203 Decidim: JWT-backed authentication can be replayed across organizations CVSS 3.1HIGH 8.5
- TI-2026-33168 Decidim: Private exports can be downloaded through reusable links CVSS 3.1MEDIUM 6.5
- TI-2026-33204 Decidim: CSV census record endpoints improper authorization CVSS 3.1MEDIUM 6.0
- TI-2026-33167 Decidim: Admin user search allows SQL injection through similarity-based sorting CVSS 3.1MEDIUM 5.5
Sources
- CVE-2026-45086 · CVE Program
- CVE-2026-45086 · NVD
- FIRST EPSS
- GHSA-vq6j-hj8w-7v39 · GitHub Advisory Database · CC BY 4.0
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