Plane is an open-source project management tool. Prior to 1.4.0, Plane trusts email addresses returned by Gitea OAuth and by self-managed GitLab OAuth deployments where email confirmation is disabled, without verifying that the provider authenticated ownership of the address. An attacker can set an OAuth identity's unverified provider email to a victim's address, which Plane matches directly to the victim's existing local account.
The attacker can then log in to the victim's Plane account without knowing the victim's password. GitHub, GitLab.com, and Google are not affected because those providers return verified email addresses. This issue is fixed in 1.4.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/makeplane/plane/commit/b91b61c379908d9e451613dbca23fc3803e92…
security-advisories@github.com
https://github.com/makeplane/plane/pull/9289
security-advisories@github.com
https://github.com/makeplane/plane/releases/tag/v1.4.0
security-advisories@github.com
https://github.com/makeplane/plane/security/advisories/GHSA-7j95-vh8g-f365
security-advisories@github.com