CVE-2009-1211

Blue Coat ProxySG, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.

Published: 2009-04-01 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-1211 is rated Low Risk (36.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.18%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2009-1211

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 2025-03-17 0.15% 0.18% +0.04%
2 2023-03-07 1.05% 0.15% -0.91%
3 2022-02-04 — 1.05% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-1211

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2009-1211

Affected software / configurations for CVE-2009-1211

Vendor Product Version Raw CPE
bluecoat proxysg_va-10 — cpe:2.3:a:bluecoat:proxysg_va-10:*:*:*:*:*:*:*:*
bluecoat proxysg_va-15 — cpe:2.3:a:bluecoat:proxysg_va-15:*:*:*:*:*:*:*:*
bluecoat proxysg_va-20 — cpe:2.3:a:bluecoat:proxysg_va-20:*:*:*:*:*:*:*:*
bluecoat proxysg_va-5 — cpe:2.3:a:bluecoat:proxysg_va-5:*:*:*:*:*:*:*:*
bluecoat proxysg — cpe:2.3:h:bluecoat:proxysg:*:*:*:*:*:*:*:*
bluecoat proxysg_sg210-10 — cpe:2.3:h:bluecoat:proxysg_sg210-10:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg210-10 — cpe:2.3:h:bluecoat:proxysg_sg210-10:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg210-25 — cpe:2.3:h:bluecoat:proxysg_sg210-25:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg210-25 — cpe:2.3:h:bluecoat:proxysg_sg210-25:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg210-5 — cpe:2.3:h:bluecoat:proxysg_sg210-5:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg210-5 — cpe:2.3:h:bluecoat:proxysg_sg210-5:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg510-10 — cpe:2.3:h:bluecoat:proxysg_sg510-10:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg510-10 — cpe:2.3:h:bluecoat:proxysg_sg510-10:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg510-20 — cpe:2.3:h:bluecoat:proxysg_sg510-20:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg510-20 — cpe:2.3:h:bluecoat:proxysg_sg510-20:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg510-25 — cpe:2.3:h:bluecoat:proxysg_sg510-25:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg510-25 — cpe:2.3:h:bluecoat:proxysg_sg510-25:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg510-5 — cpe:2.3:h:bluecoat:proxysg_sg510-5:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg810-10 — cpe:2.3:h:bluecoat:proxysg_sg810-10:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg810-10 — cpe:2.3:h:bluecoat:proxysg_sg810-10:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg810-20 — cpe:2.3:h:bluecoat:proxysg_sg810-20:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg810-20 — cpe:2.3:h:bluecoat:proxysg_sg810-20:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg810-25 — cpe:2.3:h:bluecoat:proxysg_sg810-25:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg810-25 — cpe:2.3:h:bluecoat:proxysg_sg810-25:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg810-5 — cpe:2.3:h:bluecoat:proxysg_sg810-5:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg9000-10 — cpe:2.3:h:bluecoat:proxysg_sg9000-10:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg9000-10 — cpe:2.3:h:bluecoat:proxysg_sg9000-10:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg9000-20 — cpe:2.3:h:bluecoat:proxysg_sg9000-20:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg9000-20 — cpe:2.3:h:bluecoat:proxysg_sg9000-20:-:-:full_proxy:*:*:*:*:*
bluecoat proxysg_sg9000-5 — cpe:2.3:h:bluecoat:proxysg_sg9000-5:-:-:acceleration:*:*:*:*:*
bluecoat proxysg_sg9000-5 — cpe:2.3:h:bluecoat:proxysg_sg9000-5:-:-:full_proxy:*:*:*:*:*

References for CVE-2009-1211

cvelogic Threat Intelligence