GHSA-VQ6J-HJ8W-7V39
Vulnerability from github – Published: 2026-07-13 16:51 – Updated: 2026-07-13 16:51Description
A participant can load the demographics questionnaire admin editor and make changes.
Technical description
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.
Reproduction steps:
Step 1. Sign in as a normal participant: Open http://localhost:3000/users/sign_in.
Step 2. Request the admin-only editor directly. Open http://localhost:3000/admin/demographics/questions/edit_questions in the same browser.
Step 3. Add another question:
Note that access was denied when attempting to see question responses or settings.
Impact
- Low-privilege users can access questionnaire-admin interfaces.
- They can read question-management surfaces that should remain limited to questionnaire managers.
Patches
See https://github.com/decidim/decidim/pull/16665
Workarounds
Disable the "decidim-demographics" module
Reference
OWASP A01:2021 Broken Access Control
Credits
This issue was discovered in a security audit organized by the Decidim Association and made by Radically Open Security against Decidim financed by NGI.
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "decidim-demographics"
},
"ranges": [
{
"events": [
{
"introduced": "0.31.0"
},
{
"fixed": "0.31.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "RubyGems",
"name": "decidim-demographics"
},
"ranges": [
{
"events": [
{
"introduced": "0.32.0.rc1"
},
{
"fixed": "0.32.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-45086"
],
"database_specific": {
"cwe_ids": [
"CWE-284"
],
"github_reviewed": true,
"github_reviewed_at": "2026-07-13T16:51:05Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "## Description\n\nA participant can load the demographics questionnaire admin editor and make changes.\n\n## Technical description\n\nThe 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.\n\nReproduction steps:\n\nStep 1. Sign in as a normal participant: Open `http://localhost:3000/users/sign_in`.\nStep 2. Request the admin-only editor directly. Open `http://localhost:3000/admin/demographics/questions/edit_questions` in the same browser.\nStep 3. Add another question:\n\n\u003cimg width=\"1522\" height=\"1174\" alt=\"decidim-questions-01\" src=\"https://github.com/user-attachments/assets/923f85d4-0e2f-4511-a9f3-a92f74dbf1d8\" /\u003e\n\nNote that access was denied when attempting to see question responses or settings.\n\n### Impact\n\n- Low-privilege users can access questionnaire-admin interfaces.\n- They can read question-management surfaces that should remain limited to questionnaire managers.\n \n### Patches\n\nSee https://github.com/decidim/decidim/pull/16665 \n\n### Workarounds\n\nDisable the \"decidim-demographics\" module \n\n### Reference\n\nOWASP A01:2021 Broken Access Control\n\n### Credits\n\nThis issue was discovered in a security audit organized by the [Decidim Association](https://decidim.org) and made by [Radically Open Security](https://www.radicallyopensecurity.com/) against Decidim financed by [NGI](https://ngi.eu/).",
"id": "GHSA-vq6j-hj8w-7v39",
"modified": "2026-07-13T16:51:05Z",
"published": "2026-07-13T16:51:05Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/decidim/decidim/security/advisories/GHSA-vq6j-hj8w-7v39"
},
{
"type": "WEB",
"url": "https://github.com/decidim/decidim/pull/16665"
},
{
"type": "PACKAGE",
"url": "https://github.com/decidim/decidim"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Decidim: Forms admin question editor lacks authorization"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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