CVE-2024-33103 identifies an arbitrary file upload vulnerability in the Media Manager component of DokuWiki version 2024-02-06a. The vulnerability enables attackers to upload specially crafted SVG files that can execute arbitrary code on the server. This occurs because the Media Manager does not properly validate or sanitize SVG files, which can contain embedded scripts or malicious payloads. The vulnerability is linked to CWE-79, indicating issues with improper input neutralization, commonly associated with cross-site scripting (XSS) or similar injection flaws. However, exploitation requires user interaction, such as an authenticated user uploading the malicious SVG file, and may only be feasible if the DokuWiki instance is misconfigured, for example, by allowing unrestricted SVG uploads or lacking proper file type restrictions. The CVSS 3.1 score of 6.1 reflects a medium severity, with network attack vector, low attack complexity, no privileges required, but requiring user interaction. The scope is changed, indicating that successful exploitation affects components beyond the vulnerable one. Currently, no public exploits or active exploitation in the wild have been reported. The vulnerability highlights the risk of arbitrary file uploads in web applications that handle user-generated content, especially when file validation is insufficient. Organizations using DokuWiki should audit their Media Manager configurations, restrict SVG uploads, and apply any available patches or updates once released.

If exploited, this vulnerability could allow attackers to execute arbitrary code on the affected DokuWiki server, potentially leading to unauthorized access, data leakage, or further compromise of the hosting environment. Although the impact on confidentiality and integrity is rated low, successful exploitation could enable attackers to manipulate wiki content, inject malicious scripts, or pivot to other systems within the network. The requirement for user interaction and potential misconfiguration limits the attack surface, reducing the likelihood of widespread exploitation. However, organizations relying on DokuWiki for internal documentation or collaboration could face operational disruptions or reputational damage if their instances are compromised. The absence of known exploits in the wild suggests limited current risk, but the vulnerability should be addressed proactively to prevent future attacks.

To mitigate this vulnerability, organizations should immediately review and harden their DokuWiki Media Manager configurations. Specifically, restrict or disable SVG file uploads unless absolutely necessary, as SVG files can contain embedded scripts. Implement strict file type validation and sanitization on all uploaded files. Employ web application firewalls (WAFs) to detect and block malicious upload attempts targeting SVG or other vector files. Ensure that DokuWiki instances are updated to the latest versions once patches addressing this vulnerability are released. Additionally, enforce the principle of least privilege for users who can upload files, and monitor upload activity for suspicious behavior. Conduct regular security audits and penetration tests focusing on file upload functionalities. Educate users about the risks of uploading untrusted files and require authentication for upload actions to reduce exposure.