{"id":"CVE-2018-12702","aliases":["EUVD-2018-4655","GHSA-q76v-j96w-gw2c"],"status":"published","title":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem ...","description":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem (GVE), an Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the \"evilReflex\" issue. NOTE: a PeckShield disclosure states \"some researchers have independently discussed the mechanism of such vulnerability.\"","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01077,"percentile":0.65228,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2018-06-25T10:00:00Z","modified":"2026-06-17T01:38:12Z","products":[{"vendor":"gve","product":"globalvillage_ecosystem"}],"references":[{"url":"https://huobiglobal.zendesk.com/hc/en-us/articles/360000110521-HADAX-Suspends-18T-and-GVE-Deposits-and-Withdrawals","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://peckshield.com/2018/06/23/evilReflex/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-12702"},{"url":"https://github.com/advisories/GHSA-q76v-j96w-gw2c"}],"sources":{"cve":[{"id":"CVE-2018-12702","description":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem (GVE), an Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the \"evilReflex\" issue. NOTE: a PeckShield disclosure states \"some researchers have independently discussed the mechanism of such vulnerability.\"","status":"published","published":"2018-06-25T10:00:00Z","modified":"2024-08-05T08:45:02.243Z","updated_at":"2026-11-02T14:35:06.679212Z"}],"euvd":[{"id":"EUVD-2018-4655","description":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem (GVE), an Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the \"evilReflex\" issue. NOTE: a PeckShield disclosure states \"some researchers have independently discussed the mechanism of such vulnerability.\"","status":"published","published":"2018-06-25T10:00:00Z","modified":"2024-08-05T08:45:02Z","updated_at":"2026-11-03T02:39:52.08472Z"}],"ghsa":[{"id":"GHSA-q76v-j96w-gw2c","title":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem ...","description":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem (GVE), an Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the \"evilReflex\" issue. NOTE: a PeckShield disclosure states \"some researchers have independently discussed the mechanism of such vulnerability.\"","status":"published","published":"2022-05-14T03:02:59Z","modified":"2023-02-02T05:07:06Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:52:25.892644Z"}],"nvd":[{"id":"CVE-2018-12702","description":"The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem (GVE), an Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the \"evilReflex\" issue. NOTE: a PeckShield disclosure states \"some researchers have independently discussed the mechanism of such vulnerability.\"","status":"published","published":"2018-06-25T10:29:00.22Z","modified":"2026-06-17T01:38:12.033Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:04:30.900603Z"}]}}