{"cve":"CVE-2020-21359","nvd":{"published":"2021-08-11T21:15:07.873","modified":"2026-06-17T03:03:38.693","status":"Modified","description":"An arbitrary file upload vulnerability in the Template Upload function of Maccms10 allows attackers bypass the suffix whitelist verification to execute arbitrary code via adding a character to the end of the uploaded file's name.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-434"],"references":["https://github.com/magicblack/maccms10/issues/80","https://github.com/magicblack/maccms10/issues/80"],"products":["maccms:maccms"],"source":"nvd","synced_at":"2026-10-19T21:21:57.125947417+00:00"},"epss":{"cve":"CVE-2020-21359","score":0.01733,"percentile":0.77644,"date":"2026-11-01"},"kev":null,"osv":[],"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."]}