#VU56464 Security features bypass in WordPress - CVE-2021-39203

Vulnerability identifier: #VU56464

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-39203

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WordPress
Web applications / CMS

Vendor: WordPress.ORG

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to an error in the block editor under certain conditions. A remote attacker can bypass access restrictions to view private post types/data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WordPress: 5.8 beta 1

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External links
https://hackerone.com/reports/1225282
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-qxvw-qxm9-qvg6

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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.