CVEvulnerability

CVE-2026-45117

9.8 CRITICAL Published 2026-08-18 Modified 2026-09-08 Official page ↗
Status
Deferred
Published
2026-08-18
Last modified
2026-09-08
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-94

Description

MyBB is free and open source forum software. From 1.8.13 until 1.8.40, the installer module does not properly escape user-supplied database configuration values written to the configuration file, resulting in PHP code injection and remote code execution when the installer is available. install/index.php processes the values with addcslashes(), but the $characters argument added in MyBB 1.8.13 does not include the backslash character, allowing crafted input to escape the generated PHP string. The uniquely identifying implementation details include introduced in MyBB 1.8.13. This issue is fixed in version 1.8.40.

Related

Weakness · CWE (1)

  • CWE-94 Improper Control of Generation of Code weakness

References