How severe is CVE-2004-1993?

CVE-2004-1993 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2004-1993 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-1993?

CVE-2004-1993 primarily affects Omail Omail Webmail. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-1993?

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

When was CVE-2004-1993 published?

CVE-2004-1993 was published on 2004-05-04 and last updated on 2026-06-16.

CVE-2004-1993

CVE-2004-1993 is a critical-severity vulnerability in Omail Omail Webmail with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Omail Omail Webmail
Published: 2004-05-04
Last modified: 2026-06-16

Description

The patch to the checklogin function in omail.pl for omail webmail 0.98.5 is incomplete, which allows remote attackers to execute arbitrary commands via shell metacharacters such as "`" (backticks) in the password.

Frequently asked questions

What is CVE-2004-1993?: The patch to the checklogin function in omail.pl for omail webmail 0.98.5 is incomplete, which allows remote attackers to execute arbitrary commands via shell metacharacters such as "`" (backticks) in the password.
How severe is CVE-2004-1993?: CVE-2004-1993 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2004-1993 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-1993?: CVE-2004-1993 primarily affects Omail Omail Webmail. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-1993?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2004-1993 published?: CVE-2004-1993 was published on 2004-05-04 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:omail:omail_webmail:0.97.3:*:*:*:*:*:*:*
cpe:2.3:a:omail:omail_webmail:0.98.3:*:*:*:*:*:*:*
cpe:2.3:a:omail:omail_webmail:0.98.5:*:*:*:*:*:*:*

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