CVE-2007-1454: PHP

Medium severity, CVSS 4.3. EPSS: 1.4% chance of exploitation in the next 30 days.

ext/filter in PHP 5.2.0, when FILTER_SANITIZE_STRING is used with the FILTER_FLAG_STRIP_LOW flag, does not properly strip HTML tags, which allows remote attackers to conduct cross-site scripting (XSS) attacks via HTML with a '<' character followed by certain whitespace characters, which passes one filter but is collapsed into a valid tag, as demonstrated using %0b.

Affected products

• PHP PHP: version 5.2.0 only

Published 2007-03-14. Last modified 2026-06-16.