Safe Mode bypass in October CMS

1) Security features bypass

EUVDB-ID: #VU68284

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-35944

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote user to compromise the affected system.

The vulnerability exists due to improperly imposed security restrictions when providing public access to the admin panel. A remote user with access to the admin panel and permission to open the "Editor" section can bypass the Safe Mode (cms.safe_mode) restriction and introduce new PHP code in a CMS template using a specially crafted request. As a result, remote PHP code execution is possible.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

October CMS: 2.2.0 - 3.0.65

CPE2.3

• cpe:2.3:a:octobercms:october:2.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.7:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.8:*:*:*:*:*:*:*
• cpe:2.3:a:octobercms:october:2.2.9:*:*:*:*:*:*:*

External links

https://github.com/octobercms/october/security/advisories/GHSA-x4q7-m6fp-4v9v/

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.