Penpot is an open-source design and prototyping platform. Prior to 2.18.0, assemble-chunks retrieves an upload session using only its session ID, while upload-chunk correctly scopes the lookup to the authenticated profile. An authenticated user who obtains another user's live, completed upload-session UUID can assemble the victim's chunks into the attacker's own file, team font, or project import, disclosing the uploaded bytes and deleting the victim's pending session.
This issue is fixed in version 2.18.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/penpot/penpot/commit/367e4d534c536c33d4f3fbad375f3e9c29b787a6
security-advisories@github.com
https://github.com/penpot/penpot/pull/11012
security-advisories@github.com
https://github.com/penpot/penpot/releases/tag/2.18.0
security-advisories@github.com
https://github.com/penpot/penpot/security/advisories/GHSA-5vrm-3c6w-gjfv
security-advisories@github.com