{"id":"CVE-2021-20440","aliases":["EUVD-2021-7858","GHSA-6f4h-wv9p-43cg"],"status":"published","title":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member...","description":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536.","severity":{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/PR:L/A:L/C:H/AC:H/S:U/I:L/UI:N/RC:C/RL:O/E:U","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00714,"percentile":0.54101,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-03-15T15:30:17Z","modified":"2026-06-17T03:33:51Z","products":[{"vendor":"ibm","product":"api connect"},{"vendor":"ibm","product":"api_connect"}],"references":[{"url":"https://www.ibm.com/support/pages/node/6430107","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/196536","tags":["vdb-entry","x_refsource_XF","x_transferred","VDB Entry","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20440"},{"url":"https://github.com/advisories/GHSA-6f4h-wv9p-43cg"}],"sources":{"cve":[{"id":"CVE-2021-20440","description":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536.","status":"published","published":"2021-03-15T15:30:17.41Z","modified":"2024-09-16T20:01:51.745Z","cvss":[{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/PR:L/A:L/C:H/AC:H/S:U/I:L/UI:N/RC:C/RL:O/E:U","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:32:55.905855Z"}],"euvd":[{"id":"EUVD-2021-7858","description":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536.","status":"published","published":"2021-03-15T15:30:17Z","modified":"2024-09-16T20:01:51Z","cvss":[{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/PR:L/A:L/C:H/AC:H/S:U/I:L/UI:N/RC:C/RL:O/E:U","level":"medium"}],"updated_at":"2026-11-03T00:55:17.735013Z"}],"ghsa":[{"id":"GHSA-6f4h-wv9p-43cg","title":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member...","description":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536.","status":"published","published":"2022-05-24T17:44:33Z","modified":"2023-01-29T05:05:41Z","updated_at":"2026-11-02T14:45:51.307262Z"}],"nvd":[{"id":"CVE-2021-20440","description":"IBM API Connect 10.0.0.0, and 2018.4.1.0 through 2018.4.1.13 does not restrict member registration to the intended recepient. An attacker who is a valid user in the user registry used by API Manager can use a stolen invitation link and register themselves as a member of an API provider organization. IBM X-Force ID: 196536.","status":"published","published":"2021-03-15T16:15:13.217Z","modified":"2026-06-17T03:33:51.45Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:50.805771Z"}]}}