CVE-2024-23348 in A-Blog CMS
Summary
by MITRE • 01/23/2024
Improper input validation vulnerability in a-blog cms Ver.3.1.x series versions prior to Ver.3.1.7, Ver.3.0.x series versions prior to Ver.3.0.29, Ver.2.11.x series versions prior to Ver.2.11.58, Ver.2.10.x series versions prior to Ver.2.10.50, and Ver.2.9.0 and earlier allows a remote authenticated attacker to execute arbitrary JavaScript code by uploading a specially crafted SVG file.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 02/17/2024
The vulnerability identified as CVE-2024-23348 represents a critical security flaw in the a-blog content management system affecting multiple version series including 3.1.x prior to 3.1.7, 3.0.x prior to 3.0.29, 2.11.x prior to 2.11.58, 2.10.x prior to 2.10.50, and 2.9.0 and earlier. This issue stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied content, specifically when processing SVG (Scalable Vector Graphics) file uploads. The vulnerability manifests when authenticated attackers exploit the system's failure to adequately validate SVG file contents, allowing them to inject malicious JavaScript code that executes within the context of the victim's browser session. This type of vulnerability falls under the CWE-20 category for improper input validation and aligns with ATT&CK technique T1566.001 for spearphishing attachments, as it enables attackers to deliver malicious payloads through seemingly legitimate file uploads.
The technical exploitation of this vulnerability occurs through a carefully crafted SVG file that contains embedded JavaScript code within its markup structure. When the CMS processes and renders this SVG file, the system fails to strip or properly sanitize the malicious script tags, allowing the JavaScript to execute in the victim's browser context. This creates a persistent cross-site scripting (XSS) attack vector that can be leveraged for various malicious activities including session hijacking, credential theft, and data exfiltration. The authenticated nature of the attack means that an attacker must first gain valid credentials to the CMS, but once obtained, they can leverage this vulnerability to escalate their privileges and maintain persistent access to the system. The vulnerability's impact is particularly severe because SVG files are commonly used for logos, icons, and other graphical elements in web applications, making them a frequent target for malicious injection.
The operational consequences of CVE-2024-23348 extend beyond simple XSS exploitation to potentially compromise entire web applications and user data integrity. An attacker who successfully exploits this vulnerability can execute arbitrary code on victim browsers, potentially leading to complete system compromise through session theft, data manipulation, or redirection to malicious sites. The vulnerability affects multiple version series simultaneously, indicating a systemic issue within the CMS's file validation logic that has persisted across several major releases. Organizations running affected versions of a-blog CMS face significant risk of unauthorized access and data breaches, particularly in environments where the CMS is used for content management, user interaction, or business-critical operations. The vulnerability's persistence across multiple versions suggests that the underlying input validation mechanism may not have been properly addressed in previous security patches, requiring comprehensive remediation across all affected release lines.
Organizations should immediately implement mitigations including updating to the latest available versions of a-blog CMS that contain fixes for this vulnerability, specifically versions 3.1.7, 3.0.29, 2.11.58, 2.10.50, and 2.9.0 or later. Additionally, administrators should implement strict file validation policies that enforce MIME type checking and content sanitization for all SVG uploads, ensuring that embedded JavaScript is stripped from SVG files before processing. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, while monitoring systems should be configured to detect unusual file upload patterns or attempts to execute malicious scripts. Security teams should also conduct comprehensive vulnerability assessments across all CMS installations to identify and remediate similar issues, ensuring that input validation mechanisms are properly implemented throughout the application stack. The vulnerability's classification as a high-severity issue according to industry standards underscores the critical importance of immediate remediation to prevent potential exploitation and maintain the integrity of web applications using this CMS.