CVE-2008-4929: Mybb

High severity, CVSS 7.5. EPSS: 2.2% chance of exploitation in the next 30 days.

MyBB (aka MyBulletinBoard) 1.4.2 uses insufficient randomness to compose filenames of uploaded files used as attachments, which makes it easier for remote attackers to read these files by guessing filenames.

Affected products

• Mybb Mybb: version 1.4.2 only

Published 2008-11-04. Last modified 2026-06-16.