← Vulnerability feed

Vulnerability record · CVE-2009-2453 · published 14 July 2009

CVE-2009-2453: Citrix presentation server permissions and access controls vulnerability

Citrix · Presentation Server

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.

7.5 CVSS 2.0 High EPSS 1.4% · top 28.1% CWE-264 · Permissions and access controls
7.5CVSS 2.0 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://osvdb.org/53900
http://secunia.com/advisories/34865 Vendor Advisory
http://support.citrix.com/article/CTX118792 PatchVendor Advisory
http://www.securityfocus.com/bid/34691 Patch
http://www.securitytracker.com/id?1022114 Patch
http://www.vupen.com/english/advisories/2009/1154 PatchVendor Advisory
http://osvdb.org/53900
http://secunia.com/advisories/34865 Vendor Advisory
http://support.citrix.com/article/CTX118792 PatchVendor Advisory
http://www.securityfocus.com/bid/34691 Patch
http://www.securitytracker.com/id?1022114 Patch
http://www.vupen.com/english/advisories/2009/1154 PatchVendor Advisory

Track CVE-2009-2453 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2008-0356Citrix Presentation Server IMA Service Buffer OverflowThe Independent Management Architecture (IMA) service in Citrix Presentation Server 4.5 and earlier, Access Essentials 2.0 and earlier, and Desktop S…EPSS 73%analysed9.8CVE-2016-6493Citrix xenapp vulnerabilityCitrix XenApp 6.x before 6.5 HRP07 and 7.x before 7.9 and Citrix XenDesktop before 7.9 might allow attackers to weaken an unspecified security mitiga…EPSS 2.2%9.3CVE-2012-5161Citrix xenapp vulnerabilityThe XML Service interface in Citrix XenApp 6.5 and 6.5 Feature Pack 1 allows remote attackers to execute arbitrary code via unspecified vectors.EPSS 5.7%8.8CVE-2020-8283Citrix virtual apps and desktops improper privilege management vulnerabilityAn authorised user on a Windows host running Citrix Universal Print Server can perform arbitrary command execution as SYSTEM in CVAD versions before …EPSS 2.7%8.8CVE-2020-8269Citrix virtual apps and desktops improper privilege management vulnerabilityAn unprivileged Windows user on the VDA can perform arbitrary command execution as SYSTEM in CVAD versions before 2009, 1912 LTSR CU1 hotfixes CTX285…EPSS 2.7%7.8CVE-2021-22928Citrix virtual apps and desktops vulnerabilityA vulnerability has been identified in Citrix Virtual Apps and Desktops that could, if exploited, allow a user of a Windows VDA that has either Citri…EPSS 0.25%7.5CVE-2016-4810Citrix xenapp improper access control vulnerabilityCitrix Studio before 7.6.1000, Citrix XenDesktop 7.x before 7.6 LTSR Cumulative Update 1 (CU1), and Citrix XenApp 7.5 and 7.6 allow attackers to set …EPSS 0.86%6.8CVE-2008-4676Citrix access essentials permissions and access controls vulnerabilityUnspecified vulnerability in Citrix XenApp (formerly Presentation Server) 4.5 Feature Pack 1 and earlier, Presentation Server 4.0, and Access Essenti…EPSS 0.29%

Source: NIST National Vulnerability Database (record CVE-2009-2453), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.