CVE-2025-29459: Mybb

High severity, CVSS 7.6. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue in MyBB 1.8.38 allows a remote attacker to obtain sensitive information via the Mail function. NOTE: the Supplier disputes this because of the allowed actions of Board administrators and because of SSRF mitigation.

Affected products

• Mybb Mybb: version 1.8.38 only

Published 2025-04-17. Last modified 2026-06-17.