CVE-2023-33956 Parameter based Indirect Object Referencing leading to private file exposure in Kanboard
Attackers can read private files uploaded by other users by manipulating URL parameters, leading to unauthorized disclosure of sensitive information.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-33956?
CVE-2023-33956 is a medium-severity vulnerability in kanboard, published on 5 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kanboard is open source project management software that focuses on the Kanban methodology. Versions prior to 1.2.30 are subject to an Insecure direct object reference (IDOR) vulnerability present in the application's URL parameter. This vulnerability enables any user to read files uploaded by any other user, regardless of their privileges or restrictions. By Changing the file_id any user can render all the files where MimeType is image uploaded under **/files** directory regard less of uploaded by any user. This vulnerability poses a significant impact and severity to the application's security. By manipulating the URL parameter, an attacker can access sensitive files that should only be available to authorized users. This includes confidential documents or any other type of file stored within the application. The ability to read these files can lead to various detrimental consequences, such as unauthorized disclosure of sensitive information, privacy breaches, intellectual property theft, or exposure of trade secrets. Additionally, it could result in legal and regulatory implications, reputation damage, financial losses, and potential compromise of user trust. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Which versions are affected by CVE-2023-33956?
It affects 1 product.
Products include Kanboard Kanboard.
How do I fix CVE-2023-33956?
No fix has been published for CVE-2023-33956 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-33956 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-33956 exists.
Other vulnerabilities in kanboard
- CVE-2026-21881 Kanboard is Vulnerable to Reverse Proxy Authentication Bypass
- CVE-2025-55010 Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events
- CVE-2024-51747 Arbitrary File Read and Delete in kanboard
- CVE-2024-51748 Remote code execution through language setting in kanboard
- CVE-2017-12850 Business logic in n/a
Sources
Also known as GHSA-r36m-44gg-wxg2.