{"id":"CVE-2020-35217","aliases":["EUVD-2021-0807","GHSA-9q69-g5gc-9fgf"],"status":"published","title":"Cross-Site Request Forgery in Vert.x-Web framework","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00587,"percentile":0.48339,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-352"],"published":"2021-01-20T12:28:44Z","modified":"2026-10-20T10:53:18Z","fixes":[{"ecosystem":"Maven","package":"io.vertx:vertx-web","fixed_in":["4.0.0-milestone5"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone1"},{"last_affected":"4.0.0-milestone1"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone1"]},{"source":"ghsa","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone2"},{"last_affected":"4.0.0-milestone2"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone2"]},{"source":"ghsa","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone3"},{"last_affected":"4.0.0-milestone3"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone3"]},{"source":"ghsa","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone4"},{"last_affected":"4.0.0-milestone4"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone4"]},{"source":"osv","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone1"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone1","4.0.0-milestone2","4.0.0-milestone3","4.0.0-milestone4"]},{"source":"osv","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone2"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone2","4.0.0-milestone3","4.0.0-milestone4"]},{"source":"osv","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone3"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone3","4.0.0-milestone4"]},{"source":"osv","ecosystem":"Maven","package":"io.vertx:vertx-web","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.0.0-milestone4"},{"fixed":"4.0.0-milestone5"}]}],"versions":["4.0.0-milestone4"]}],"products":[{"vendor":"eclipse","product":"vert.x-web"}],"references":[{"url":"https://github.com/vert-x3/vertx-web/pull/1613","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35217","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9q69-g5gc-9fgf"}],"sources":{"cve":[{"id":"CVE-2020-35217","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","status":"published","published":"2021-01-20T12:28:44Z","modified":"2024-08-04T17:02:06.925Z","updated_at":"2026-11-02T14:35:57.975444Z"}],"euvd":[{"id":"EUVD-2021-0807","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","status":"published","published":"2021-01-20T12:28:44Z","modified":"2024-08-04T17:02:06Z","updated_at":"2026-11-03T03:07:06.885366Z"}],"ghsa":[{"id":"GHSA-9q69-g5gc-9fgf","title":"Cross-Site Request Forgery in Vert.x-Web framework","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","status":"published","published":"2021-04-22T16:16:18Z","modified":"2023-02-01T05:05:37Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:36:34.917834Z"}],"nvd":[{"id":"CVE-2020-35217","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","status":"published","published":"2021-01-20T13:15:12.44Z","modified":"2026-06-17T03:13:33.01Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T14:06:30.596418Z"}],"osv":[{"id":"CVE-2020-35217","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","status":"published","published":"2021-01-20T13:15:12.44Z","modified":"2026-10-20T10:53:18.277368986Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.612899Z"},{"id":"GHSA-9q69-g5gc-9fgf","title":"Cross-Site Request Forgery in Vert.x-Web framework","description":"Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.","status":"published","published":"2021-04-22T16:16:18Z","modified":"2023-11-08T04:03:33.135481Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-352"],"updated_at":"2026-11-02T15:46:44.225359Z"}]}}