CVE-2002-1820

CRITICALNVD 9.89.8—

9.8

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."

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 81.6%
KEV: Not listed

Published

December 31, 2002

Last Modified

April 16, 2026

Advisory Details (2)

Auto-updated May 1, 2026

No patch confirmed yet.

generic

http://www.securityfocus.com/bid/5580

generic

http://www.securityfocus.com/archive/1/289417

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 07:37 UTCEG score recompute
2026-05-20 07:37 UTCGHSA enrichment
2026-05-20 03:34 UTCEG score recompute
2026-05-20 03:34 UTCGHSA enrichment
2026-05-19 23:11 UTCEG score recompute

Frequently asked(5)

What is CVE-2002-1820?

CVE-2002-1820 is a critical vulnerability published on December 31, 2002. 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."

When was CVE-2002-1820 disclosed?

CVE-2002-1820 was first published in the National Vulnerability Database on December 31, 2002, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2002-1820 actively exploited?

CVE-2002-1820 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 81.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2002-1820?

CVE-2002-1820 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2002-1820?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-1820, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2002-1820

📅 Published

🔄 Last Modified

📋 Advisory Details (2)