vulnerability / NVI-00012052 / Revision 1
Vikunja: Cross-project task disclosure through subtask expansion
GitHub lists this reviewed advisory for code.vikunja.io/api. 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.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
code.vikunja.io/api
source listed<= 2.5.0
### Summary Vikunja lets a task in one project have a subtask that lives in a different project. When listing a project's tasks, an option pulls in those subtasks (?expand%5B%5D=subtasks). The main listing is correctly filtered to the projects the caller can access, but the subtask expansion is not: it returns the linked subtasks regardless of whether the caller has any access to the project they belong to. So a member with read-only access to one project can read the full content of tasks in other, private projects, any task that is a (recursive) subtask of a task the member is allowed to see. ### Details Subtasks can cross project boundaries; a task in an accessible project can be linked as the parent of a subtask that lives in a private project. Creating that link requires access to both tasks, so the link itself is set up legitimately by someone who has it. The problem is what happens afterwards, on read. When a task list is requested with subtask expansion, the server takes the tasks the caller is allowed to see and walks their subtask relations recursively to fetch the linked tasks. That fetch doesn't apply the access-control filter the main listing use, it returns every l
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-3hc7-r24j-rpwc ↗
GitHub Advisory Database · vendor advisory
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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.