{"id":71265,"date":"2025-09-04T16:47:09","date_gmt":"2025-09-04T16:47:09","guid":{"rendered":""},"modified":"2025-10-16T17:20:29","modified_gmt":"2025-10-16T23:20:29","slug":"cve-2025-55383-critical-file-upload-vulnerability-in-moss-before-v0-15","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-55383-critical-file-upload-vulnerability-in-moss-before-v0-15\/","title":{"rendered":"CVE-2025-55383: Critical File Upload Vulnerability in Moss Before v0.15<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

Today, we tackle a critical vulnerability identified as CVE-2025-55383, which affects the Moss platform before v0.15. This vulnerability is of utmost concern as it allows attackers to upload files with any extension to any location on the target server. Such a vulnerability can potentially compromise a system or lead<\/a> to significant data leakage, thereby posing a serious threat to the confidentiality, integrity, and availability of data.
\nThis vulnerability stands out due<\/a> to its high severity score, which is an alarming 8.6. This score indicates the potential damage it can cause<\/a> if left unpatched. For organizations relying heavily on Moss for their operations, this vulnerability is a ticking time<\/a> bomb that needs immediate attention.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-55383
\nSeverity: High (8.6)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise and potential data<\/a> leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Moss | Before v0.15<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of a misconfiguration in the “upload” function of Moss. This misconfiguration allows an attacker to bypass security restrictions and upload files<\/a> of any extension to any location on the target server. The attacker can upload a malicious script or executable file<\/a>, which can then be executed to compromise the system or to leak sensitive data.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

The following is a conceptual example of how an attacker might exploit this vulnerability. This is a sample HTTP POST request to upload a malicious file<\/a> to the server:<\/p>\n

POST \/upload\/file HTTP\/1.1\nHost: target.example.com\nContent-Type: multipart\/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW\n------WebKitFormBoundary7MA4YWxkTrZu0gW\nContent-Disposition: form-data; name=\"file\"; filename=\"malicious_script.sh\"\nContent-Type: application\/x-sh\n{ \"malicious_script\": \"...\" }\n------WebKitFormBoundary7MA4YWxkTrZu0gW--<\/code><\/pre>\n
Mitigation<\/strong><\/p>\n
The best mitigation for this vulnerability is to apply the vendor patch. It is strongly recommended to upgrade to a version of Moss that is v0.15 or later. Until the patch can be applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure. These systems can be configured to block or alert on suspicious file uploads that may be attempts to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview Today, we tackle a critical vulnerability identified as CVE-2025-55383, which affects the Moss platform before v0.15. This vulnerability is of utmost concern as it allows attackers to upload files with any extension to any location on the target server. Such a vulnerability can potentially compromise a system or lead to significant data leakage, thereby […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-71265","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t