CVE-2004-0621: admin.php in Newsletter ZWS allows remote attackers to gain administrative privileges via a list_user operatio

This week

HIGH 10.0MITIGATE

CVE-2004-0621 is a high-severity flaw (CVSS 10.0) affecting newsletter zws. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

admin.php in Newsletter ZWS allows remote attackers to gain administrative privileges via a list_user operation with the ulevel parameter set to 1 (administrator level), which lists all users and their passwords.

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Published	2004-12-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: zaireweb solutions

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

Am I affected?

Timeline

2004-12-06 05:00 UTCPublished CVE record published
2026-06-16 22:06 UTCUpdated Record last modified

zaireweb solutions newsletter zws 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 newsletter-zws || rpm -q newsletter-zws || newsletter-zws --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: ZaireWeb Solutions NewsLetter ZWS - Administrative Interface 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-2004-0621?

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

Is CVE-2004-0621 being exploited?

CVE-2004-0621 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-2004-0621 affect?

CVE-2004-0621 affects newsletter zws. Severity is high (CVSS 10.0). admin.php in Newsletter ZWS allows remote attackers to gain administrative privileges via a list_user operation with the ulevel parameter set to 1 (administrator level), which lists all users and their passwords.

How urgent is CVE-2004-0621?

Priority 63/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

References

← Back to latest CVEs