CVE-2021-26634: Maxb Maxboard

Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days.

SQL injection and file upload attacks are possible due to insufficient validation of input values in some parameters and variables of files compromising Maxboard, which may lead to arbitrary code execution or privilege escalation. Attackers can use these vulnerabilities to perform attacks such as stealing server management rights using a web shell.

Affected products

• Maxb Maxboard: before 1.9.6 (fixed in 1.9.6)

Published 2022-06-02. Last modified 2026-06-17.