Vulnerability identifier: #VU51537

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27947

CWE-ID: CWE-89

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MyBB
Other software / Other software solutions

Vendor: MyBB Group

Description

The vulnerability allows a remote user to execute arbitrary SQL queries in database.

The vulnerability exists due to insufficient sanitization of user-supplied data within the Copy Forum feature in Forum Management. A remote administrator can send a specially crafted request to the affected application and execute arbitrary SQL commands within the application database.

Successful exploitation of this vulnerability may allow a remote attacker to read, delete, modify data in database and gain complete control over the affected application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MyBB: 1.8.0 - 1.8.25

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External links
http://github.com/mybb/mybb/security/advisories/GHSA-jjx8-8mcp-7h65

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.