Vulnerability identifier: #VU24807

Vulnerability risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5502

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
phpBB
Web applications / Forum & blogging software

Vendor: phpBB Group

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website, such as approve pending group memberships.

Mitigation
Install update from vendor's website.

Vulnerable software versions

phpBB: 3.2.0 - 3.2.8

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External links
http://blog.phpbb.com/category/security/
http://www.phpbb.com/community/viewtopic.php?f=14&t=2534536

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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.