{"id":"CVE-2021-22565","aliases":["GHSA-wx8q-rgfr-cf6v","GO-2022-0270"],"url":"https://o3.security/vulnerability/CVE-2021-22565","summary":"Insufficient Granularity of Access Control in github.com/google/exposure-notifications-verification-server","details":"### Impact\nUsers or API keys with permission to expire verification codes could have expired codes that belonged to another realm if they guessed the UUID.\n\n### Patches\nv1.1.2+\n\n### Workarounds\nThere are no workarounds, and there are no indications this has been exploited in the wild. Verification codes can only be expired by providing their 64-bit UUID, and verification codes are already valid for a very short period of time (thus the UUID rotates frequently).\n\n### For more information\nContact exposure-notifications-feedback@google.com","published":"2021-12-09T13:15:08.767Z","modified":"2026-07-09T10:52:18.606604Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/google/exposure-notifications-verification-server","fixedVersion":"1.1.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/google/exposure-notifications-verification-server/security/advisories/GHSA-wx8q-rgfr-cf6v"},{"type":"FIX","url":"https://github.com/google/exposure-notifications-verification-server/releases/tag/v1.1.2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22565"},{"type":"WEB","url":"https://github.com/google/exposure-notifications-verification-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T10:52:18.606604Z"}}