Is CVE-2005-3420 actively exploited?

CVE-2005-3420 has no public evidence of in-the-wild exploitation as of 2025-04-03.

What is the CVSS score for CVE-2005-3420?

CVE-2005-3420 has a CVSS score of 7.5 (UNKNOWN severity). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P.

How do I patch CVE-2005-3420?

Patch guidance is available from phpbb group security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2005-3420.

CVE-2005-3420 - remediation guidance & executive summary

Q: Which products are affected by CVE-2005-3420?

27 products: phpbb group phpbb, phpbb group phpbb, phpbb group phpbb, phpbb group phpbb, phpbb group phpbb, and 22 more.

Description

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 Metrics

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector: network
Access Cmplx: low
Auth: none
Confidentiality: partial
Integrity: partial
Availability: partial
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: PHPBB_GROUP
Published: 11/1/2005
Last Modified: 4/3/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

phpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbbphpbb_group : phpbb

Remediation Guidance

Executive Summary

View on NIST NVD