{"cve":"CVE-2021-25835","nvd":{"published":"2021-02-08T18:15:13.803","modified":"2026-06-17T03:42:29.923","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-294"],"references":["https://github.com/cosmos/ethermint/issues/687","https://github.com/cosmos/ethermint/pull/692","https://github.com/cosmos/ethermint/issues/687","https://github.com/cosmos/ethermint/pull/692"],"products":["chainsafe:ethermint"],"source":"nvd","synced_at":"2026-10-19T21:14:10.479542811+00:00"},"epss":{"cve":"CVE-2021-25835","score":0.01309,"percentile":0.70633,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-x5f3-qmwj-4f84","url":"https://osv.dev/vulnerability/GHSA-x5f3-qmwj-4f84","summary":"Authentication bypass by capture-replay in github.com/cosmos/ethermint","modified":"2024-08-21T15:58:36.636777Z","packages":[{"ecosystem":"Go","name":"github.com/cosmos/ethermint","purl":"pkg:golang/github.com/cosmos/ethermint","ranges":["<0.4.1"],"fixed":["0.4.1"]}]},{"id":"GO-2022-0889","url":"https://osv.dev/vulnerability/GO-2022-0889","summary":"Authentication bypass by capture-replay in github.com/cosmos/ethermint","modified":"2026-03-03T04:52:26.989744Z","packages":[{"ecosystem":"Go","name":"github.com/cosmos/ethermint","purl":"pkg:golang/github.com/cosmos/ethermint","ranges":["<0.4.1"],"fixed":["0.4.1"]}]}],"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."]}