Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-30943 is a privilege escalation vulnerability in the file replace API of the Gokapi file sharing server versions up to 2.2.3. It occurs because of an insufficient authorization check that allows a user with only list visibility permission (UserPermListOtherUploads) and replace permission for their own files to delete files owned by other users by exploiting the deleteNewFile flag. This bypasses the intended requirement for explicit delete permissions (UserPermDeleteOtherUploads).'}, {'type': 'paragraph', 'content': "The vulnerability enables any authenticated user with these limited permissions to delete any other user's file without needing the proper delete rights, impacting data integrity but not confidentiality or availability."}] [1]

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Impact Analysis

This vulnerability can impact you by allowing an authenticated user with limited permissions to delete files owned by other users without proper authorization. This compromises the integrity of stored data, as unauthorized deletions can occur.

Although it does not affect confidentiality or availability, the loss or unauthorized removal of files can disrupt workflows, cause data loss, and undermine trust in the file sharing system.

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Compliance Impact

I don't know

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Detection Guidance

I don't know

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'To mitigate this vulnerability, you should update Gokapi to version 2.2.4 or later, as this version includes the security fix addressing CVE-2026-30943.'}, {'type': 'paragraph', 'content': "This update corrects the insufficient authorization check in the file replace API that allowed users with only list visibility permission to delete other users' files."}, {'type': 'paragraph', 'content': 'Applying this update will prevent unauthorized file deletions and secure your system against this privilege escalation vulnerability.'}] [2]

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