Description

WordPress is prone to a vulnerability that lets attackers delete arbitrary files because the application fails to properly verify user-supplied input. An attacker can exploit this vulnerability to delete arbitrary files in the context of the webserver process, rendering the website unusable, or even to execute arbitrary code on the webserver. WordPress versions 4.2.x ranging from 4.2 and up to (and including) 4.2.20 are vulnerable.

Remediation

Update to WordPress version 4.2.21 or latest

References

https://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/

http://blog.vulnspy.com/2018/06/27/Wordpress-4-9-6-Arbitrary-File-Delection-Vulnerbility-Exploit/

https://www.exploit-db.com/exploits/44949/

https://packetstormsecurity.com/files/148333/WordPress-4.9.6-Arbitrary-File-Deletion.html

https://www.wordfence.com/blog/2018/07/details-of-an-additional-file-deletion-vulnerability-patched-in-wordpress-4-9-7/

http://blog.nsfocus.net/wordpress-delete-any-file/

https://codex.wordpress.org/Version_4.2.21

Related Vulnerabilities

WordPress Plugin Responsive Slider-Image Slider-Slideshow for WordPress SQL Injection (2.6.8)

WordPress Plugin LionScripts:IP Blocker Lite Cross-Site Request Forgery (10.3)

WordPress Plugin MP3-jPlayer Local File Disclosure (2.3)

Joomla! Core 1.0.x Multiple Cross-Site Scripting Vulnerabilities (1.0.0 - 1.0.10)

WordPress Plugin Slimstat Analytics Cross-Site Scripting (4.8)

Severity

High

Classification

CVE-2018-12895 CWE-73 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

Tags

Missing Update