{"cve":"CVE-2021-20723","nvd":{"published":"2021-05-24T04:15:14.947","modified":"2026-06-17T03:34:19.360","status":"Modified","description":"Reflected cross-site scripting vulnerability in [MailForm01] free edition (versions which the last updated date listed at the top of descriptions in the program file is from 2014 December 12 to 2018 July 27) allows a remote attacker to inject an arbitrary script via unspecified vectors.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://jvn.jp/en/jp/JVN53910556/index.html","https://www.php-factory.net/mail/01.php","https://jvn.jp/en/jp/JVN53910556/index.html","https://www.php-factory.net/mail/01.php"],"products":["mailform01_project:mailform01"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-20723","score":0.00777,"percentile":0.55833,"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."]}