Plane is an open-source project management tool. Prior to 1.4.0, Plane's OAuth avatar synchronization flow fetches avatar_url from provider user data through a server-side HTTP request without internal IP validation and follows redirects by default. An attacker can provide an avatar URL that redirects to an internal-only resource, such as a metadata endpoint, and Plane uploads the fetched response as a user avatar file. The object is then exposed through /api/assets/v2/static/{asset_id}/, allowing exfiltration of internally fetched content. This issue is fixed in 1.4.0.
Exploitability
AV:NAC:LPR:HUI:NScope
S:CImpact
C:HI:LA:N7.6/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:NInput Validation