MyBB is free and open source forum software. Prior to version 1.8.39, the upgrade component does not validate user input properly, which allows attackers to perform local file inclusion (LFI) via a specially crafted parameter value. In order to exploit the vulnerability, the installer must be unlocked (no `install/lock` file present) and the upgrade script must be accessible (by re-installing the forum via access to `install/index.php`; when the forum has not yet been installed; or the attacker is authenticated as a forum administrator). MyBB 1.8.39 resolves this issue.
References
Link | Resource |
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https://github.com/mybb/mybb/commit/6e6cfbd524d9101b51e1278ecf520479b64b0f00 | Patch |
https://github.com/mybb/mybb/security/advisories/GHSA-q4jv-xwjx-37cp | Vendor Advisory |
https://mybb.com/versions/1.8.39 | Product Release Notes |
Configurations
History
02 Jul 2025, 15:18
Type | Values Removed | Values Added |
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First Time |
Mybb
Mybb mybb |
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Summary |
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References | () https://github.com/mybb/mybb/commit/6e6cfbd524d9101b51e1278ecf520479b64b0f00 - Patch | |
References | () https://github.com/mybb/mybb/security/advisories/GHSA-q4jv-xwjx-37cp - Vendor Advisory | |
References | () https://mybb.com/versions/1.8.39 - Product, Release Notes | |
CPE | cpe:2.3:a:mybb:mybb:*:*:*:*:*:*:*:* |
02 Jun 2025, 16:15
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2025-06-02 16:15
Updated : 2025-07-02 15:18
NVD link : CVE-2025-48940
Mitre link : CVE-2025-48940
CVE.ORG link : CVE-2025-48940
JSON object : View
Products Affected
mybb
- mybb
CWE
CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')