{"cve":"CVE-2009-2453","nvd":{"published":"2009-07-14T14:30:00.547","modified":"2026-06-16T23:09:28.903","status":"Modified","description":"Citrix XenApp (formerly Presentation Server) 4.5 Hotfix Rollup Pack 3 does not apply an access policy when it is defined with the Access Gateway Advanced Edition filters, which allows attackers to bypass intended access restrictions via unknown vectors.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-264"],"references":["http://osvdb.org/53900","http://secunia.com/advisories/34865","http://support.citrix.com/article/CTX118792","http://www.securityfocus.com/bid/34691","http://www.securitytracker.com/id?1022114"],"products":["citrix:presentation_server","citrix:xenapp"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-2453","score":0.0143,"percentile":0.73024,"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."]}