Nginx · Nginx · CVE-2021-24490
**Name of the Vulnerable Software and Affected Versions**
The Email Artillery (MASS EMAIL) WordPress plugin versions 4.1 and earlier
**Description**
The issue allows arbitrary files to be uploaded due to improper checking of uploaded files from the Import Emails feature. Additionally, the plugin lacks a CSRF check, making it exploitable via a CSRF attack. However, the presence of a .htaccess file, which denies access to everything in the folder where the file is uploaded, limits the accessibility of the malicious uploaded file to web servers like Nginx/IIS.
**Recommendations**
For The Email Artillery (MASS EMAIL) WordPress plugin versions 4.1 and earlier:
As a temporary workaround, consider disabling the Import Emails feature until a patch is available.
Restrict access to the folder where files are uploaded to minimize the risk of exploitation.
Avoid using the plugin on web servers such as Nginx/IIS until the issue is resolved.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.