#VU48040 Cross-site request forgery in WordPress - CVE-2020-28040

Vulnerability identifier: #VU48040

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-28040

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WordPress
Web applications / CMS

Vendor: WordPress.ORG

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website, such as change a theme's background image.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WordPress: 5.5 - 5.5.1

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External links
https://wordpress.org/news/2020/10/wordpress-5-5-2-security-and-maintenance-release/
https://github.com/WordPress/wordpress-develop/commit/cbcc595974d5aaa025ca55625bf68ef286bd8b41

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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.