{"id":"CVE-2021-46525","aliases":["EUVD-2021-33201","GHSA-r2fp-jg3h-x57v"],"status":"published","title":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","description":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00777,"percentile":0.56134,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2022-01-27T20:22:13Z","modified":"2026-10-20T10:55:10Z","products":[{"vendor":"cesanta","product":"mjs"}],"references":[{"url":"https://github.com/cesanta/mjs/issues/199","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-46525"},{"url":"https://github.com/advisories/GHSA-r2fp-jg3h-x57v"}],"sources":{"cve":[{"id":"CVE-2021-46525","description":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","status":"published","published":"2022-01-27T20:22:13Z","modified":"2024-08-04T05:10:34.972Z","updated_at":"2026-11-02T14:33:02.930115Z"}],"euvd":[{"id":"EUVD-2021-33201","description":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","status":"published","published":"2022-01-27T20:22:13Z","modified":"2024-08-04T05:10:34Z","updated_at":"2026-11-03T03:08:23.591313Z"}],"ghsa":[{"id":"GHSA-r2fp-jg3h-x57v","title":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","description":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","status":"published","published":"2022-01-28T00:01:12Z","modified":"2023-02-03T05:05:32Z","cwes":["CWE-416"],"updated_at":"2026-11-02T14:53:45.336505Z"}],"nvd":[{"id":"CVE-2021-46525","description":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","status":"published","published":"2022-01-27T21:15:10.16Z","modified":"2026-06-17T04:15:01.4Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:07:04.178977Z"}],"osv":[{"id":"CVE-2021-46525","description":"Cesanta MJS v2.20.0 was discovered to contain a heap-use-after-free via mjs_apply at src/mjs_exec.c.","status":"published","published":"2022-01-27T21:15:10.16Z","modified":"2026-10-20T10:55:10.006633269Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:22.18434Z"}]}}