GHSA-vcgv-7rvm-m3vp
Duplicate Advisory: Vikunja: Link-share token can enumerate users through the v2 API
- Severity
- 0.0 / 10
- Medium · CVSS 4.0
- Exploit chance (EPSS)
- —
- No score published
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- Fix
- None yet
- No fixed version published
Description
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-vfxw-3x8p-2vjr. This link is maintained to preserve external references.
Original Description
Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user search endpoints. Attackers with a read-only share link can enumerate project users via the projects endpoint and confirm arbitrary usernames exist via the global search endpoint.
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| code.vikunja.io/api | <= 2.5.0 |
No fix yet |
How to fix
No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality (vulnerable system)
- Low
- Integrity (vulnerable system)
- None
- Availability (vulnerable system)
- None
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
- Exploit maturity
- Not defined
- Scope
- X
CVSS 3.1 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Weakness
CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
How to prevent it
- Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References
Advisories
Other links
Timeline
- Published
- Withdrawn
- Last updated by the source
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-m687-p538-r5hp Vikunja: Permissive Cross-domain Security Policy trusts every localhost origin which should not be trusted | Medium | Also affects code.vikunja.io/api |
| GHSA-fmmf-xq98-g327 Vikunja: Write-level project members can delete admin-tier link shares through an unloaded permission check | Medium | Also affects code.vikunja.io/api |
| GHSA-pjr3-86v4-5p7w Vikunja: Explicit lower-permission share on a sub-project is silently overridden by an inherited parent permission (broken access control / privilege-management regression in v2.6.0) | Medium | Also affects code.vikunja.io/api |
| GHSA-hjx8-qv73-f7cm Vikunja: Webhooks and link shares survive every revocation path, so a removed collaborator keeps a live feed | High | Also affects code.vikunja.io/api |
| GHSA-fprf-r6rv-xg99 Vikunja: Saved filter creation with an empty filter string recalculates task positions across all tenants | Medium | Also affects code.vikunja.io/api |
| GHSA-4hv6-xc92-j86g Vikunja: WebSocket authentication ignores server-side session state, so revoked sessions keep receiving live pushes | High | Also affects code.vikunja.io/api |
| GHSA-w2ch-4xgr-22ww Vikunja: Task relation deletion does not check read access to the other task, allowing cross-project relation removal | Low | Also affects code.vikunja.io/api |
| GHSA-8wvg-r2j4-3737 Vikunja: Assignee email addresses disclosed to read-only project members via the task assignees endpoint | Medium | Also affects code.vikunja.io/api |
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