How severe is CVE-2004-0051?

CVE-2004-0051 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2004-0051 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-0051?

CVE-2004-0051 primarily affects Clearswift Mailsweeper. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-0051?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2004-0051 published?

CVE-2004-0051 was published on 2004-10-20 and last updated on 2026-06-16.

CVE-2004-0051

CVE-2004-0051 is a high-severity vulnerability in Clearswift Mailsweeper with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Clearswift Mailsweeper
Published: 2004-10-20
Last modified: 2026-06-16

Description

Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use non-standard but frequently supported Content-Transfer-Encoding values such as (1) uuencode, (2) mac-binhex40, and (3) yenc, which may be interpreted differently by mail clients.

Frequently asked questions

What is CVE-2004-0051?: Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME messages that use non-standard but frequently supported Content-Transfer-Encoding values such as (1) uuencode, (2) mac-binhex40, and (3) yenc, which may be interpreted differently by mail clients.
How severe is CVE-2004-0051?: CVE-2004-0051 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2004-0051 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-0051?: CVE-2004-0051 primarily affects Clearswift Mailsweeper. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-0051?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2004-0051 published?: CVE-2004-0051 was published on 2004-10-20 and last updated on 2026-06-16.

References

Affected products (22)

cpe:2.3:a:clearswift:mailsweeper:4.3.7:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper:4.3.8:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper:4.3.10:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper:4.3.11:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper:4.3.13:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper:4.3.14:*:*:*:*:*:*:*
cpe:2.3:a:clearswift:mailsweeper:4.3.15:*:*:*:*:*:*:*
cpe:2.3:a:f-secure:internet_gatekeeper:6.3:*:*:*:*:*:*:*
cpe:2.3:a:f-secure:internet_gatekeeper:6.4:*:*:*:*:*:*:*
cpe:2.3:a:f-secure:internet_gatekeeper:6.31:*:*:*:*:*:*:*
cpe:2.3:a:f-secure:internet_gatekeeper:6.32:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.2.7:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.3.2.0:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.3.2.2:*:*:*:*:*:*:*
cpe:2.3:a:paul_l_daniels:ripmime:1.3.2.3:*:*:*:*:*:*:*

More vulnerabilities in Clearswift Mailsweeper

CVE-2004-0234 — Critical (CVSS 10.0): Multiple stack-based buffer overflows in the get_header function in header.c for LHA 1.14, as used in products such as…
CVE-2003-1016 — High (CVSS 7.5): Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME…
CVE-2004-0161 — High (CVSS 7.5): Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME…
CVE-2004-0162 — High (CVSS 7.5): Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME…
CVE-2004-0053 — High (CVSS 7.5): Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME…
CVE-2004-0052 — High (CVSS 7.5): Multiple content security gateway and antivirus products allow remote attackers to bypass content restrictions via MIME…

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