CVE-2004-1661: MailWorks Professional allows remote attackers to bypass authentication and gain privileges via a cookie that

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HIGH 7.5MITIGATE

CVE-2004-1661 is a high-severity flaw (CVSS 7.5) affecting mailworks professional. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MailWorks Professional allows remote attackers to bypass authentication and gain privileges via a cookie that contains "auth=1" and "uId=1."

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2004-09-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: sitecubed

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-09-02 04:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

sitecubed mailworks professional MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mailworks-professional || rpm -q mailworks-professional || mailworks-professional --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: SiteCubed MailWorks Professional - Authentication Bypass

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2004-1661?

mailworks professional: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1661 being exploited?

CVE-2004-1661 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2004-1661 affect?

CVE-2004-1661 affects mailworks professional. Severity is high (CVSS 7.5). MailWorks Professional allows remote attackers to bypass authentication and gain privileges via a cookie that contains "auth=1" and "uId=1."

How urgent is CVE-2004-1661?

Priority 53/100. High severity; Public exploit reference

References

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