CVE-2009-4039 in Piwigo
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Piwigo before 2.0.6 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 08/06/2025
The vulnerability identified as CVE-2009-4039 represents a cross-site scripting flaw within the Piwigo photo gallery software ecosystem prior to version 2.0.6. This type of vulnerability falls under the broader category of web application security weaknesses that specifically target the client-side execution environment where user interactions occur. The flaw enables malicious actors to inject arbitrary web scripts or HTML content into web pages viewed by other users, creating a persistent threat vector that can be exploited across multiple user sessions. Piwigo, being a widely-used open-source photo gallery management system, serves as a platform where users upload and share photographic content, making it an attractive target for attackers seeking to compromise user sessions or redirect traffic to malicious sites.
The technical nature of this XSS vulnerability stems from insufficient input validation and output sanitization mechanisms within the Piwigo application codebase. Attackers can leverage this weakness through unspecified vectors that likely involve user-controllable parameters or data fields within the application interface. These unspecified vectors could encompass various input points such as user profile information, photo captions, comments, or administrative settings where user-supplied content is processed and displayed without adequate sanitization. The vulnerability classification aligns with CWE-79 which specifically addresses cross-site scripting flaws in software applications, where improper validation of user-supplied data leads to execution of malicious scripts in the victim's browser context. The attack typically requires no special privileges or access to system resources, as it exploits weaknesses in the application's data handling processes rather than underlying system vulnerabilities.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling sophisticated attack chains that can compromise user sessions, steal sensitive information, or redirect users to phishing sites. An attacker could craft malicious payloads that exploit the XSS vulnerability to steal session cookies, which would allow them to impersonate legitimate users and gain unauthorized access to their accounts. Additionally, the vulnerability could be leveraged to deliver malware payloads or redirect users to malicious websites that appear legitimate, thereby creating a phishing attack vector. The persistence of such attacks means that any user viewing affected content could be compromised, making this vulnerability particularly dangerous in environments where multiple users interact with shared photo galleries or where administrators manage content uploaded by various contributors. The attack surface is further expanded when considering that Piwigo installations often serve as platforms for user-generated content, increasing the potential exposure of vulnerable input fields.
Mitigation strategies for CVE-2009-4039 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the Piwigo application. The most effective remediation involves updating to Piwigo version 2.0.6 or later, which contains the necessary patches to address the XSS vulnerability. Organizations should also implement proper content sanitization techniques that filter or escape potentially dangerous characters and script tags from user input before processing or displaying it. Security measures including the implementation of Content Security Policy headers can provide additional protection layers against XSS attacks by restricting script execution within the browser context. According to ATT&CK framework, this vulnerability maps to technique T1059.007 which covers the use of scripting languages for execution, and T1566 which addresses social engineering through malicious content delivery. Regular security audits and penetration testing of web applications should be conducted to identify similar vulnerabilities, while maintaining up-to-date security patches across all software components to prevent exploitation of known weaknesses in the application stack.