A cross-site scripting (XSS) vulnerability in Monstra CMS v3.0.4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the About Me parameter in the Edit Profile page.

An arbitrary file upload vulnerability in Monstra CMS v3.0.4 allows attackers to execute arbitrary code via uploading a crafted PHP file.

A remote code execution (RCE) vulnerability in the component /admin/index.php?id=themes&action=edit_template&filename=blog of Monstra v3.0.4 allows attackers to execute arbitrary commands via a crafted PHP file.

An issue in Monstra CMS v3.0.4 allows attackers to execute arbitrary web scripts or HTML via bypassing the file extension filter and uploading crafted HTML files.

Cross Site Scripting vulnerabilty in Monstra CMS 3.0.4 via the page feature in admin/index.php.

A stored cross site scripting (XSS) vulnerability in Monstra CMS version 3.0.4 allows attackers to execute arbitrary web scripts or HTML via crafted a payload entered into the "Site Name" field under the "Site Settings" module.

Monstra CMS 3.0.4 allows attackers to execute arbitrary code via a crafted payload entered into the "Snippet content" field under the "Edit Snippet" module.

A local file inclusion vulnerability was discovered in the captcha function in Monstra 3.0.4 which allows remote attackers to execute arbitrary PHP code.

Monstra CMS 3.0.4 allows an attacker, who already has administrative access to modify .chunk.php files on the Edit Chunk screen, to execute arbitrary OS commands via the Theme Module by visiting the admin/index.php?id=themes&action=edit_chunk URI. NOTE: there is no indication that the Edit Chunk feature was intended to prevent an administrator from using PHP's exec feature

Monstra CMS 3.0.4 allows remote authenticated users to upload and execute arbitrary PHP code via admin/index.php?id=filesmanager because, for example, .php filenames are blocked but .php7 filenames are not, a related issue to CVE-2017-18048.