CVE-2008-0251 in PhotoPost vBGallery
Summary
by MITRE
Unrestricted file upload vulnerability in PhotoPost vBGallery before 2.4.2 allows remote attackers to upload and execute arbitrary files via unknown vectors.
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Analysis
by VulDB Data Team • 09/06/2025
The CVE-2008-0251 vulnerability represents a critical unrestricted file upload flaw discovered in PhotoPost vBGallery versions prior to 2.4.2, fundamentally compromising the security posture of affected systems. This vulnerability falls under the broader category of insecure file handling within web applications, creating an attack vector that enables remote adversaries to bypass normal file validation mechanisms and execute malicious code on target servers. The flaw specifically manifests in the gallery's file upload functionality, where insufficient input validation and access control measures allow attackers to upload files with potentially dangerous extensions or content.
The technical implementation of this vulnerability stems from inadequate sanitization of user-supplied file data during the upload process. Attackers can exploit this weakness by crafting malicious files with extensions such as .php, .asp, or .jsp that are typically restricted from upload but are accepted due to flawed validation logic. The vulnerability's impact extends beyond simple file placement, as it enables arbitrary code execution, allowing attackers to gain persistent access to compromised systems. This weakness directly maps to CWE-434, which describes the improper restriction of uploads of executable files, and aligns with ATT&CK technique T1190 for exploitation of remote services through file upload vulnerabilities.
The operational implications of this vulnerability are severe and multifaceted, as it provides attackers with a direct path to establish persistent backdoors, deploy web shells, or execute malicious payloads that can further compromise the affected infrastructure. Once exploited, attackers can leverage the uploaded files to perform reconnaissance activities, escalate privileges, or use the compromised system as a launching point for lateral movement within networks. The vulnerability's remote exploitability means that attackers do not require local access or credentials to initiate the attack, making it particularly dangerous in environments where web applications are exposed to untrusted users. Organizations running vulnerable versions face significant risk of data breaches, system compromise, and potential regulatory violations.
Mitigation strategies for CVE-2008-0251 should prioritize immediate patching of affected PhotoPost vBGallery installations to version 2.4.2 or later, which includes proper file validation and access control measures. Security configurations must enforce strict file type validation, implement proper content-type checking, and utilize secure file naming conventions to prevent executable file execution. Organizations should also implement network-level restrictions to limit upload capabilities to trusted users and employ web application firewalls to detect and block suspicious upload attempts. Additional defensive measures include monitoring upload directories for unauthorized file creations, implementing proper file permissions, and conducting regular security assessments to identify similar vulnerabilities in other web applications. The remediation process must also include user education and access control reviews to ensure that only authorized personnel can perform file upload operations within the application.