{"id":"CVE-2021-43116","aliases":["EUVD-2022-6208","GHSA-2g86-r6w2-wqqr"],"status":"published","title":"Use of Hard-coded Credentials in Nacos","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.07464,"percentile":0.94541,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-287","CWE-798"],"published":"2022-07-05T00:00:00Z","modified":"2026-10-20T10:55:01Z","exploits":[{"source":"exploitdb","id":"EDB-51205","title":"Nacos 2.0.3 - Access Control vulnerability","type":"webapps","platform":"java","date":"2023-04-03","url":"https://www.exploit-db.com/exploits/51205"}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.alibaba.nacos:nacos-client","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.0.3"}]}]},{"source":"osv","ecosystem":"Maven","package":"com.alibaba.nacos:nacos-client","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.0.3"}]}],"versions":["0.1.0","0.2.0","0.2.1","0.2.1-RC1","0.3.0","0.3.0-RC1","0.4.0","0.5.0","0.6.0","0.6.1","0.6.2","0.8.0","0.8.1","0.8.2","0.9.0","0.9.1","1.0.0","1.0.0-RC1","1.0.0-RC2","1.0.0-RC3","1.0.0-RC4","1.0.1","1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.2.0","1.2.0-beta.0","1.2.0-beta.1","1.2.1","1.3.0","1.3.1","1.3.1-BETA","1.3.1-BETA.1","1.3.2","1.3.3","1.4.0","1.4.0-BETA","1.4.1","1.4.2","1.4.3","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","2.0.0","2.0.0-ALPHA.1","2.0.0-ALPHA.2","2.0.0-BETA","2.0.1","2.0.2","2.0.3"]}],"products":[{"vendor":"alibaba","product":"nacos"}],"references":[{"url":"https://github.com/alibaba/nacos/issues/7127","tags":["x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/alibaba/nacos/issues/7182","tags":["x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"http://packetstormsecurity.com/files/171638/Nacos-2.0.3-Access-Control.html","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43116","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-2g86-r6w2-wqqr"},{"url":"https://github.com/alibaba/nacos","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-43116","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","status":"published","published":"2022-07-05T00:00:00Z","modified":"2024-08-04T03:47:13.593Z","updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2022-6208","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","status":"published","published":"2022-07-05T00:00:00Z","modified":"2024-08-04T03:47:13Z","updated_at":"2026-11-03T03:24:14.796505Z"}],"ghsa":[{"id":"GHSA-2g86-r6w2-wqqr","title":"Use of Hard-coded Credentials in Nacos","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","status":"published","published":"2022-07-06T00:00:30Z","modified":"2023-04-04T21:46:40Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287","CWE-798"],"updated_at":"2026-11-02T14:36:49.768564Z"}],"nvd":[{"id":"CVE-2021-43116","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","status":"published","published":"2022-07-05T14:15:08.767Z","modified":"2026-06-17T04:10:31.94Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:07:06.501652Z"}],"osv":[{"id":"CVE-2021-43116","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","status":"published","published":"2022-07-05T14:15:08.767Z","modified":"2026-10-20T10:55:01.833433753Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.557945Z"},{"id":"GHSA-2g86-r6w2-wqqr","title":"Use of Hard-coded Credentials in Nacos","description":"An Access Control vulnerability exists in Nacos 2.0.3 in the access prompt page; enter username and password, click on login to capture packets and then change the returned package, which lets a malicious user login.","status":"published","published":"2022-07-06T00:00:30Z","modified":"2026-09-10T03:49:49.551254591Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287","CWE-798"],"updated_at":"2026-11-02T15:46:34.338541Z"}]}}