{"id":"CVE-2026-104978","published":"2026-10-05T18:17:33.247","lastModified":"2026-10-07T21:17:09.960","description":"Plane is an open-source project management tool. Prior to 1.4.0, Plane's project invitation list endpoint is accessible to any authenticated user who knows the workspace slug and project ID, while the public project invitation join endpoint accepts an invitation based only on a submitted email address. When a pending invitation targets an email address that has not registered with Plane, an attacker can enumerate the invitation, register an account using the invited email without mailbox verification, and accept the invitation. The attacker-controlled account is then added to the target workspace and project. This issue is fixed in 1.4.0.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","cwes":["CWE-863"],"vendors":[],"products":[],"references":[{"url":"https://github.com/makeplane/plane/commit/14a4c22f94eac1582439e41112213f976c6a6cf7","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9308","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-g36h-p63v-g9c7","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-g36h-p63v-g9c7","tags":[]}],"exploitRefs":[{"url":"https://github.com/makeplane/plane/commit/14a4c22f94eac1582439e41112213f976c6a6cf7","tags":[]},{"url":"https://github.com/makeplane/plane/pull/9308","tags":[]},{"url":"https://github.com/makeplane/plane/releases/tag/v1.4.0","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-g36h-p63v-g9c7","tags":[]},{"url":"https://github.com/makeplane/plane/security/advisories/GHSA-g36h-p63v-g9c7","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows any authenticated user to join a project by knowing the workspace slug and project ID, and an attacker can register an account without mailbox verification to accept the invitation, gaining unauthorized access to the project.","exploitability":"Exploitation is moderately easy as it requires knowledge of the workspace slug and project ID, and the attacker must register an account without mailbox verification.","blast_radius":"If exploited, the attacker can join the target workspace and project, potentially leading to data exposure or manipulation.","remediation":"Upgrade to version 1.4.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","project-management"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-06T08:45:24.200Z"}}