Vulnerability identifier: #VU23955

Vulnerability risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2019-20203

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Postie
Web applications / Modules and components for CMS

Vendor: Wayne Allen

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in the Authorized Addresses feature. A remote attacker can spoof the From information of an email message and publish a post as a valid user.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Postie: 1.1.5 - 1.9.40

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External links
http://github.com/V1n1v131r4/Exploiting-Postie-WordPress-Plugin-/blob/master/README.md
http://postieplugin.com/
http://wordpress.org/plugins/postie/#developers
http://wpvulndb.com/vulnerabilities/10002

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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. However, proof of concept for this vulnerability is available.