#VU56888 Improper access control in Ghost

Vulnerability identifier: #VU56888

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Ghost
Web applications / CMS

Vendor: Ghost

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to an error in the implementation of the member email change functionality. A remote attacker can change the email address of arbitrary member accounts to one they control.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Ghost: 3.18.0 - 3.42.5, 4.0.0 - 4.15.0

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External links
https://github.com/TryGhost/Ghost/releases/tag/v4.15.1
https://github.com/TryGhost/Ghost/security/advisories/GHSA-65p7-pjj8-ggmr

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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.