{"cve":"CVE-2021-43116","nvd":{"published":"2022-07-05T14:15:08.767","modified":"2026-06-17T04:10:31.940","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-287"],"references":["http://packetstormsecurity.com/files/171638/Nacos-2.0.3-Access-Control.html","https://github.com/alibaba/nacos/issues/7127","https://github.com/alibaba/nacos/issues/7182","http://packetstormsecurity.com/files/171638/Nacos-2.0.3-Access-Control.html","https://github.com/alibaba/nacos/issues/7127"],"products":["alibaba:nacos"],"source":"nvd","synced_at":"2026-10-19T21:33:44.859608815+00:00"},"epss":{"cve":"CVE-2021-43116","score":0.07464,"percentile":0.94465,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2g86-r6w2-wqqr","url":"https://osv.dev/vulnerability/GHSA-2g86-r6w2-wqqr","summary":"Use of Hard-coded Credentials in Nacos","modified":"2026-09-10T03:49:49.551254591Z","packages":[{"ecosystem":"Maven","name":"com.alibaba.nacos:nacos-client","purl":"pkg:maven/com.alibaba.nacos/nacos-client","ranges":["<=2.0.3"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}