CVE-2005-3751

HTTP request smuggling vulnerability in Pound before 1.9.4 allows remote attackers to poison web caches, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with conflicting Content-length and Transfer-encoding headers.

Published: 2005-11-22 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2005-3751 is rated Moderate Risk (41.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.47%). 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-2005-3751

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 2026-06-15 1.77% 1.47% -0.30%
2 2025-03-30 1.91% 1.77% -0.14%
3 2025-03-29 — 1.91% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2005-3751

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N 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:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2005-3751

OS Trackers for CVE-2005-3751

vendor priority summary link
debian low CVE-2005-3751 low priority: Debian including 1 source packages (pound), 4 status rows across 4 suites (bullseye, forky, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2005-3751
gentoo low CVE-2005-3751: 1 GLSA(s) (200606-05), 1 atom(s) (www-servers/pound); latest impact low. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2005-3751

Affected software / configurations for CVE-2005-3751

Vendor Product Version Raw CPE
apsis pound <= 1.9.3 cpe:2.3:a:apsis:pound:*:*:*:*:*:*:*:*

References for CVE-2005-3751

cvelogic Threat Intelligence