Vulnerability identifier: #VU9831

Vulnerability risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-1000423

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
b2evolution
Web applications / CMS

Vendor: b2evolution.net

Description

The vulnerability allows a remote attacker to execute arbitrary PHP code.

The vulnerability exists due to improper input validation (backslash and single quote escape) in basic install functionality. A remote attacker can execute arbitrary PHP code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

b2evolution: 6.6.0 - 6.8.10

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External links
http://github.com/b2evolution/b2evolution/commit/0096a3ebc85f6aadbda2c4427cd092a538b161d2
http://github.com/b2evolution/b2evolution/commit/b899d654d931f3bf3cfbbdd71e0d1a0f3a16d04c

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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