{"id":"CVE-2020-21526","aliases":["EUVD-2020-14294","GHSA-44fm-5g3x-mp3f"],"status":"published","title":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the...","description":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background, a directory traversal check is performed on the input path parameter, but the startsWith function can be used to bypass it.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.0189,"percentile":0.79832,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2020-09-30T14:43:02Z","modified":"2026-06-17T03:03:45Z","products":[{"vendor":"halo","product":"halo"}],"references":[{"url":"https://github.com/halo-dev/halo/issues/421","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-21526"},{"url":"https://github.com/advisories/GHSA-44fm-5g3x-mp3f"}],"sources":{"cve":[{"id":"CVE-2020-21526","description":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background, a directory traversal check is performed on the input path parameter, but the startsWith function can be used to bypass it.","status":"published","published":"2020-09-30T14:43:02Z","modified":"2024-08-04T14:30:33.198Z","updated_at":"2026-11-02T14:35:48.854892Z"}],"euvd":[{"id":"EUVD-2020-14294","description":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background, a directory traversal check is performed on the input path parameter, but the startsWith function can be used to bypass it.","status":"published","published":"2020-09-30T14:43:02Z","modified":"2024-08-04T14:30:33Z","updated_at":"2026-11-03T03:07:23.734565Z"}],"ghsa":[{"id":"GHSA-44fm-5g3x-mp3f","title":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the...","description":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background, a directory traversal check is performed on the input path parameter, but the startsWith function can be used to bypass it.","status":"published","published":"2022-05-24T17:29:50Z","modified":"2023-01-29T05:04:15Z","updated_at":"2026-11-02T14:45:30.341086Z"}],"nvd":[{"id":"CVE-2020-21526","description":"An Arbitrary file writing vulnerability in halo v1.1.3. In an interface to write files in the background, a directory traversal check is performed on the input path parameter, but the startsWith function can be used to bypass it.","status":"published","published":"2020-09-30T18:15:24.163Z","modified":"2026-06-17T03:03:45.333Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:06:17.70091Z"}]}}