{"cve":"CVE-2020-8181","nvd":{"published":"2020-07-10T16:15:11.703","modified":"2026-06-17T03:26:00.297","status":"Modified","description":"A missing file type check in Nextcloud Contacts 3.2.0 allowed a malicious user to upload any file as avatars.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-434","CWE-840"],"references":["https://hackerone.com/reports/808287%2C","https://nextcloud.com/security/advisory/?id=NC-SA-2020-024","https://hackerone.com/reports/808287%2C","https://nextcloud.com/security/advisory/?id=NC-SA-2020-024"],"products":["nextcloud:contacts"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-8181","score":0.0079,"percentile":0.56283,"date":"2026-10-31"},"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."]}