How severe is CVE-2005-3751?

CVE-2005-3751 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2005-3751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-3751?

CVE-2005-3751 affects Apsis Pound. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2005-3751?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-3751 published?

CVE-2005-3751 was published on 2005-11-22 and last updated on 2026-06-16.

CVE-2005-3751

CVE-2005-3751 is a medium-severity vulnerability in Apsis Pound with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apsis Pound
Published: 2005-11-22
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2005-3751?: CVE-2005-3751 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2005-3751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-3751?: CVE-2005-3751 affects Apsis Pound. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2005-3751?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-3751 published?: CVE-2005-3751 was published on 2005-11-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:apsis:pound:*:*:*:*:*:*:*:*

More vulnerabilities in Apsis Pound

CVE-2016-10711 — Critical (CVSS 9.8): Apsis Pound before 2.8a allows request smuggling via crafted headers, a different vulnerability than CVE-2005-3751.
CVE-2018-21245 — Critical (CVSS 9.1): Pound before 2.8 allows HTTP request smuggling, a related issue to CVE-2016-10711.
CVE-2005-1391 — High (CVSS 7.5): Buffer overflow in the add_port function in APSIS Pound 1.8.2 and earlier allows remote attackers to execute arbitrary…
CVE-2004-2026 — High (CVSS 7.5): Format string vulnerability in the logmsg function in svc.c for Pound 1.5 and earlier allows remote attackers to…

All CVEs affecting Apsis Pound →