CVE-2004-1315: Phpbb Group Phpbb

High severity, CVSS 7.5. EPSS: 72.5% chance of exploitation in the next 30 days.

viewtopic.php in phpBB 2.x before 2.0.11 improperly URL decodes the highlight parameter when extracting words and phrases to highlight, which allows remote attackers to execute arbitrary PHP code by double-encoding the highlight value so that special characters are inserted into the result, which is then processed by PHP exec, as exploited by the Santy.A worm.

Affected products

• Phpbb Group Phpbb: any version; version 1.0.0 only; version 1.0.1 only; version 1.2.0 only; version 1.2.1 only; version 1.4.0 only; …

Published 2004-11-12. Last modified 2026-06-16.