{"cve":"CVE-2021-33904","nvd":{"published":"2021-06-07T12:15:09.107","modified":"2026-06-17T03:55:21.397","status":"Modified","description":"In Accela Civic Platform through 21.1, the security/hostSignon.do parameter servProvCode is vulnerable to XSS. NOTE: The vendor states \"there are configurable security flags and we are unable to reproduce them with the available information.","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":["http://packetstormsecurity.com/files/163093/Accela-Civic-Platorm-21.1-Cross-Site-Scripting.html","https://gist.github.com/0xx7/3d934939d7122fe23db11bc48eda9d21","http://packetstormsecurity.com/files/163093/Accela-Civic-Platorm-21.1-Cross-Site-Scripting.html","https://gist.github.com/0xx7/3d934939d7122fe23db11bc48eda9d21"],"products":["accela:civic_platform"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-33904","score":0.09972,"percentile":0.95601,"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."]}