Description

WordPress Plugin Captcha contains a backdoor. Attackers can exploit this issue to execute arbitrary commands in the context of the application. Successful attacks will compromise the affected application and possibly the webserver or computer. WordPress Plugin Captcha versions starting from 4.3.6 and up to, and including 4.4.4 are vulnerable.

Remediation

Update to plugin version 4.4.5 or latest

References

https://www.wordfence.com/blog/2017/12/backdoor-captcha-plugin/

https://wordpress.org/support/topic/backdoor-2/

https://plugins.svn.wordpress.org/captcha/trunk/readme.txt

Related Vulnerabilities

WordPress Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2015-5730)

WordPress 4.9.x Multiple Vulnerabilities (4.9 - 4.9.12)

TYPO3 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Vulnerability (CVE-2019-19850)

Dot CMS Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Vulnerability (CVE-2016-8902)

WebLogic Deserialization of Untrusted Data Vulnerability (CVE-2019-17571)

Severity

High

Classification

CWE-95 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Tags

Missing Update