Penpot is an open-source design and prototyping platform. Prior to 2.18.0, the SVG exporter places an attacker-controlled text object's fill-color value into a ppmcolormask command string and executes that string through child_process.exec. A user who can edit a file can store shell metacharacters in the fill color and trigger SVG export, causing commands to execute with the exporter service's privileges.
The same export can be triggered through a valid public share link to a malicious file. This vulnerability is fixed in 2.18.0.
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
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/penpot/penpot/commit/aa3bc1ae984577f0354d4270d2546e15985f4bcf
security-advisories@github.com
https://github.com/penpot/penpot/pull/11272
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-4f36-m4hj-cv86
security-advisories@github.com