CVE-2005-3420

NONECVSS 0.0

0.0

usercp_register.php in phpBB 2.0.17 allows remote attackers to modify regular expressions and execute PHP code via the signature_bbcode_uid parameter, as demonstrated by injecting an "e" modifier into a preg_replace statement.

CVSS v3: —
EG Score: —
EPSS: 85.1%
KEV: Not listed

Published

November 1, 2005

Last Modified

April 16, 2026

References (20)

cve@mitrehttp://marc.info/?l=bugtraq&m=113081113317600&w=2
cve@mitrehttp://secunia.com/advisories/17366
cve@mitrehttp://secunia.com/advisories/18098
cve@mitrehttp://securityreason.com/securityalert/130
cve@mitrehttp://securitytracker.com/id?1015121
cve@mitrehttp://www.debian.org/security/2005/dsa-925
cve@mitrehttp://www.hardened-php.net/advisory_172005.75.html
cve@mitrehttp://www.osvdb.org/20391
cve@mitrehttp://www.securityfocus.com/bid/15243
cve@mitrehttp://www.vupen.com/english/advisories/2005/2250
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=113081113317600&w=2
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/17366
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/18098
af854a3a-2127-422b-91ae-364da2661108http://securityreason.com/securityalert/130
af854a3a-2127-422b-91ae-364da2661108http://securitytracker.com/id?1015121

Data Freshness Timeline

(refreshed 12× in last 7d / 18× 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
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2026-05-26 07:16 UTCepss_batch
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2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-20 11:20 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Frequently asked(4)

What is CVE-2005-3420?

CVE-2005-3420 is a none vulnerability published on November 1, 2005. usercpregister.php in phpBB 2.0.17 allows remote attackers to modify regular expressions and execute PHP code via the signaturebbcodeuid parameter, as demonstrated by injecting an "e" modifier into a pregreplace statement.

When was CVE-2005-3420 disclosed?

CVE-2005-3420 was first published in the National Vulnerability Database on November 1, 2005, 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-2005-3420 actively exploited?

CVE-2005-3420 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 85.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2005-3420?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2005-3420, 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-2005-3420

📅 Published

🔄 Last Modified

🔗 References (20)