vulnerability / NVI-00017773 / Revision 1
Decidim: Verification documents can be downloaded through reusable links
GitHub lists this reviewed advisory for decidim-verifications, decidim-verifications, decidim-verifications. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.5 high
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
decidim-verifications
source listed< 0.30.9
## Description Scanned identity-document images provided by participants and shown in the verification admin workflow are exposed through signed `/rails/active_storage/disk/` URLs that can be fetched without any authenticated session. Anyone who obtains one of those URLs can retrieve the document until the signature expires. ## Technical description This issue comes from the verification admin UI exposing scanned documents through reusable Active Storage disk links. 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. The affected files are `verification_attachment` blobs on Decidim::Authorization, and the admin review pages embed those signed URLs directly into the HTML for pending and confirmation views. Reproduction steps: 1. Create a fresh verification document as a normal user. 1.1. Open http://localhost:3001/users/sign_in. 1.2. Open http://localhost:3001/id_documents/authorizations/n
decidim-verifications
source listed>= 0.31.0.rc1, < 0.31.5
## Description Scanned identity-document images provided by participants and shown in the verification admin workflow are exposed through signed `/rails/active_storage/disk/` URLs that can be fetched without any authenticated session. Anyone who obtains one of those URLs can retrieve the document until the signature expires. ## Technical description This issue comes from the verification admin UI exposing scanned documents through reusable Active Storage disk links. 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. The affected files are `verification_attachment` blobs on Decidim::Authorization, and the admin review pages embed those signed URLs directly into the HTML for pending and confirmation views. Reproduction steps: 1. Create a fresh verification document as a normal user. 1.1. Open http://localhost:3001/users/sign_in. 1.2. Open http://localhost:3001/id_documents/authorizations/n
decidim-verifications
source listed>= 0.32.0.rc1, < 0.32.0
## Description Scanned identity-document images provided by participants and shown in the verification admin workflow are exposed through signed `/rails/active_storage/disk/` URLs that can be fetched without any authenticated session. Anyone who obtains one of those URLs can retrieve the document until the signature expires. ## Technical description This issue comes from the verification admin UI exposing scanned documents through reusable Active Storage disk links. 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. The affected files are `verification_attachment` blobs on Decidim::Authorization, and the admin review pages embed those signed URLs directly into the HTML for pending and confirmation views. Reproduction steps: 1. Create a fresh verification document as a normal user. 1.1. Open http://localhost:3001/users/sign_in. 1.2. Open http://localhost:3001/id_documents/authorizations/n
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-3mvf-82qp-8qh5 ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.