Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request.
This vulnerability is fixed in 2.3.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Vikunja Vikunja
cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*
|
— |
2.3.0
|
References 4
https://github.com/go-vikunja/vikunja/commit/6df0d6c8f54b01db6464c42810e40e55f1…
security-advisories@github.com
https://github.com/go-vikunja/vikunja/pull/2577
security-advisories@github.com
https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0
security-advisories@github.com
https://github.com/go-vikunja/vikunja/security/advisories/GHSA-r4fg-73rc-hhh7
security-advisories@github.com