{"id":"CVE-2021-25835","aliases":["GHSA-x5f3-qmwj-4f84","GO-2022-0889"],"url":"https://o3.security/vulnerability/CVE-2021-25835","summary":"Authentication bypass by capture-replay in github.com/cosmos/ethermint","details":"Cosmos Network Ethermint <= v0.4.0 is affected by a cross-chain transaction replay vulnerability in the EVM module. Since ethermint uses the same chainIDEpoch and signature schemes with ethereum for compatibility, a verified signature in ethereum is still valid in ethermint with the same msg content and chainIDEpoch, which enables \"cross-chain transaction replay\" attack.","published":"2021-02-08T18:15:13.803Z","modified":"2026-07-09T01:06:27.234802Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/cosmos/ethermint","fixedVersion":"0.4.1"}],"fix":{"url":"https://github.com/cosmos/ethermint/pull/692","label":"cosmos/ethermint#692"},"references":[{"type":"ADVISORY","url":"https://github.com/cosmos/ethermint/issues/687"},{"type":"FIX","url":"https://github.com/cosmos/ethermint/pull/692"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:06:27.234802Z"}}