CVE-2002-1820

Name: CVE-2002-1820
Creator: NVD / NIST
Published: 2002-12-31T05:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.38%

Last modified Jun 16, 2026

CVE-2002-1820 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. register.php in Ultimate PHP Board (UPB) 1.0 and 1.0b uses an administrative account Admin with a capital "A," but allows a remote attacker to impersonate the administrator by registering an account name of admin with a lower case "a.". EPSS estimates a 2.38% chance of exploitation in the next 30 days.

Description

register.php in Ultimate PHP Board (UPB) 1.0 and 1.0b uses an administrative account Admin with a capital "A," but allows a remote attacker to impersonate the administrator by registering an account name of admin with a lower case "a."

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.38%

81.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-178

Affected Software

Vendor	Product	Versions
Ultimate Php Board Project	Ultimate Php Board	1.0

References

http://www.iss.net/security_center/static/9972.phpBroken Link, Patch
http://www.securityfocus.com/archive/1/289417Broken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/5580Broken Link, Third Party Advisory, VDB Entry
http://www.iss.net/security_center/static/9972.phpBroken Link, Patch
http://www.securityfocus.com/archive/1/289417Broken Link, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/5580Broken Link, Third Party Advisory, VDB Entry

Timeline

Published: Dec 31, 2002
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2002-1820?

How severe is CVE-2002-1820?

CVE-2002-1820 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.38% probability of exploitation in the next 30 days.

How do I fix CVE-2002-1820?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2002-1820?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST