#VU27439 Improper access control in WordPress - CVE-2020-11028

Vulnerability identifier: #VU27439

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-11028

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WordPress
Web applications / CMS

Vendor: WordPress.ORG

Description

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

The vulnerability exists due to improper access restrictions to certain private posts. A remote non-authenticated attacker can bypass implemented security restrictions and read private posts.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WordPress: 3.7 - 3.7.32, 3.8 - 3.8.32, 3.9 - 3.9.30, 4.0 - 4.0.29, 4.1 - 4.1.29, 4.2 - 4.2.26, 4.3 - 4.3.22, 4.4 - 4.4.21, 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, 5.3 - 5.3.2, 5.4

---

External links
https://wordpress.org/news/2020/04/wordpress-5-4-1/
https://wpvulndb.com/vulnerabilities/10202/
https://core.trac.wordpress.org/changeset/47635/
https://www.wordfence.com/blog/2020/04/unpacking-the-7-vulnerabilities-fixed-in-todays-wordpress-5-4-1-security-update/
https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-xhx9-759f-6p2w

---

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.