{"id":85949,"date":"2025-12-03T09:46:24","date_gmt":"2025-12-03T09:46:24","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-29457-remote-information-disclosure-vulnerability-in-mybb-1-8-38-via-import-theme-function","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-29457-remote-information-disclosure-vulnerability-in-mybb-1-8-38-via-import-theme-function\/","title":{"rendered":"CVE-2025-29457: Remote Information Disclosure Vulnerability in MyBB 1.8.38 Via Import Theme Function<\/strong>"},"content":{"rendered":"

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

A critical vulnerability, CVE-2025-29457, has been identified in MyBB 1.8.38, a widely used open-source forum software. This vulnerability allows a remote attacker to potentially gain unauthorized access to sensitive information through the Import a Theme function. It is crucial to address this vulnerability as it could lead to system compromise and data leakage, impacting the confidentiality and integrity of the data.<\/p>\n

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

CVE ID: CVE-2025-29457
\nSeverity: High (7.6)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: Potential system compromise and data leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

MyBB | 1.8.38<\/p>\n

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

The vulnerability stems from the improper handling of the Import a Theme function in MyBB 1.8.38. A remote attacker can manipulate the function to extract sensitive information. While the exact method of exploitation is unknown, it typically involves crafting a malicious payload that, when processed by the Import a Theme function, allows the attacker to obtain sensitive data.<\/p>\n

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

The code below is a conceptual example of how the vulnerability might be exploited:<\/p>\n

POST \/mybb\/admin\/index.php?module=style-themes&action=import HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/xml\n\n\n\n<\/properties>\n<\/theme><\/code><\/pre>\n
In this example, the attacker sends a malicious XML theme to the import function. The malicious payload embedded in the theme properties can then cause the application to disclose sensitive information.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
Users are advised to apply the vendor patch as soon as it becomes available. In the meantime, deploying a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) could serve as temporary mitigation against this vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability, CVE-2025-29457, has been identified in MyBB 1.8.38, a widely used open-source forum software. This vulnerability allows a remote attacker to potentially gain unauthorized access to sensitive information through the Import a Theme function. It is crucial to address this vulnerability as it could lead to system compromise and data leakage, impacting […]<\/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":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-85949","post","type-post","status-publish","format-standard","hentry"],"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