Multiple vulnerabilities in phpBB Forum Software

Published: 2020-01-31

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-5502 CVE-2020-5501
CWE-ID	CWE-352
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	phpBB Web applications / Forum & blogging software
Vendor	phpBB Group

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site request forgery

EUVDB-ID: #VU24807

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 - Cross-Site Request Forgery (CSRF)

Exploit availability: No

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

External links

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

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.