CVE-2009-2453

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.

Published: 2009-07-14 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-2453 is rated Moderate Risk (54.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.73%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-2453

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.82% 0.73% -0.09%
2 2025-03-29 0.73% 0.82% +0.09%
3 2025-03-17 — 0.73% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2453

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2009-2453

Affected software / configurations for CVE-2009-2453

Vendor Product Version Raw CPE
citrix presentation_server 4.5 cpe:2.3:a:citrix:presentation_server:4.5:-:se:*:*:*:*:*
citrix presentation_server 4.5 cpe:2.3:a:citrix:presentation_server:4.5:-:windows_server_2003:*:*:*:*:*
citrix presentation_server 4.5 cpe:2.3:a:citrix:presentation_server:4.5:-:windows_server_2003_x64:*:*:*:*:*
citrix presentation_server 4.5 cpe:2.3:a:citrix:presentation_server:4.5:fp1:*:*:*:*:*:*
citrix xenapp 4.5 cpe:2.3:a:citrix:xenapp:4.5:fp3:*:*:*:*:*:*

References for CVE-2009-2453

cvelogic Threat Intelligence