Vulnerability identifier: #VU27438

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11027

CWE-ID: CWE-640

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WordPress
Web applications / CMS

Vendor: WordPress.ORG

Description

The vulnerability allows a remote attacker to compromise user accounts.

The vulnerability exists due to password reset token is not correctly invalidated. A remote attacker can abuse such behavior to take over another user account. 

Successful exploitation of the vulnerability may allows an attacker to gain full access to the affected website.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WordPress: 5.4, 5.3 - 5.3.2, 4.5 - 4.5.20, 4.6 - 4.6.17, 4.7 - 4.7.16, 4.8 - 4.8.12, 4.9 - 4.9.13, 5.0 - 5.0.8, 5.1 - 5.1.4, 5.2 - 5.2.5, 4.3 - 4.3.22, 4.2 - 4.2.26, 4.1 - 4.1.29, 4.0 - 4.0.29, 3.9 - 3.9.30, 3.8 - 3.8.32, 3.7 - 3.7.32, 4.4 - 4.4.21

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External links
http://wordpress.org/news/2020/04/wordpress-5-4-1/
http://wpvulndb.com/vulnerabilities/10201/
http://core.trac.wordpress.org/changeset/47634/
http://www.wordfence.com/blog/2020/04/unpacking-the-7-vulnerabilities-fixed-in-todays-wordpress-5-4-1-security-update/
http://github.com/WordPress/wordpress-develop/security/advisories/GHSA-ww7v-jg8c-q6jw

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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.