{"id":48993,"date":"2025-06-04T22:19:33","date_gmt":"2025-06-04T22:19:33","guid":{"rendered":""},"modified":"2025-06-26T23:21:16","modified_gmt":"2025-06-27T05:21:16","slug":"cve-2025-48336-critical-deserialization-of-untrusted-data-vulnerability-in-thimpress-course-builder","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-48336-critical-deserialization-of-untrusted-data-vulnerability-in-thimpress-course-builder\/","title":{"rendered":"CVE-2025-48336: Critical Deserialization of Untrusted Data Vulnerability in ThimPress Course Builder<\/strong>"},"content":{"rendered":"

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

The CVE-2025-48336 vulnerability is a critical security flaw found in the ThimPress Course Builder software. This vulnerability, termed as deserialization of untrusted data, can potentially lead to a complete system compromise or data leakage. It is a widespread vulnerability affecting all versions<\/a> of Course Builder before 3.6.6.
\nThis vulnerability is particularly concerning as ThimPress<\/a> Course Builder is a widely used tool in the education sector for creating and managing online courses. As such, a successful exploit could potentially impact a large number of institutions and individuals, leading to a severe breach of sensitive data<\/a>.<\/p>\n

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

CVE ID: CVE-2025-48336
\nSeverity: Critical (9.8)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: System compromise or data leakage<\/a><\/p>\n

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

Product | Affected Versions<\/p>\n

ThimPress Course Builder | All versions before 3.6.6<\/p>\n

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

The vulnerability arises from the ThimPress Course Builder’s handling of data<\/a> serialization and deserialization processes. In particular, the software fails to properly validate and sanitize user-supplied data before deserializing<\/a> it. An attacker can exploit this vulnerability by sending maliciously crafted serialized data<\/a> to a vulnerable application. Upon deserialization, the malicious code is executed<\/a>, potentially leading to unauthorized code execution, system compromise, or data leakage.<\/p>\n

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

Below is a conceptual example of how the vulnerability might be exploited<\/a>. This is a hypothetical HTTP request that sends a malicious serialized object to a vulnerable<\/a> endpoint.<\/p>\n

POST \/vulnerable\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"malicious_payload\": \"Serialized_Object_with_Malicious_Code\" }<\/code><\/pre>\n
Upon receiving this request, the vulnerable system would deserialize<\/a> the malicious payload, leading to the execution of the injected malicious code.<\/p>\n
Mitigation and Recommendations<\/strong><\/p>\n
To mitigate the risk associated with CVE-2025-48336, users of ThimPress Course Builder should immediately update their software to version 3.6.6 or later, where the vulnerability has been addressed<\/a>.
\nIn cases where an immediate update is not possible, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. These systems can monitor and block suspicious traffic, reducing the risk of a successful exploit.
\nAlways be sure to regularly update and patch your systems to protect against the latest known vulnerabilities<\/a>. Organizations should also implement robust security strategies, including vulnerability scanning and penetration testing, to proactively identify and address potential security weaknesses<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The CVE-2025-48336 vulnerability is a critical security flaw found in the ThimPress Course Builder software. This vulnerability, termed as deserialization of untrusted data, can potentially lead to a complete system compromise or data leakage. It is a widespread vulnerability affecting all versions of Course Builder before 3.6.6. This vulnerability is particularly concerning as ThimPress […]<\/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-48993","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