CVE-2020-9016 in Dolibarr
Summary
by MITRE
Dolibarr 11.0 allows XSS via the joinfiles, topic, or code parameter, or the HTTP Referer header.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 05/10/2025
The vulnerability identified as CVE-2020-9016 affects Dolibarr version 11.0, a web-based enterprise resource planning software widely used for managing business processes including CRM, invoicing, and inventory. This security flaw represents a cross-site scripting vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability manifests through multiple vectors including the joinfiles, topic, or code parameters within the application's URL structure, as well as through manipulation of the HTTP Referer header. These attack vectors represent common entry points for XSS attacks in web applications where user input is not properly sanitized or validated before being rendered in web responses.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the Dolibarr application's processing logic. When the application processes the joinfiles, topic, or code parameters, or when it handles the HTTP Referer header, it fails to properly sanitize user-provided data before incorporating it into dynamic web content. This allows an attacker to craft malicious payloads that, when executed in a victim's browser, can perform unauthorized actions such as stealing session cookies, redirecting users to malicious sites, or executing arbitrary JavaScript code within the context of the vulnerable application. The vulnerability specifically aligns with CWE-79, which describes Cross-Site Scripting flaws in software applications where untrusted data is improperly handled in web pages.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to escalate privileges and compromise the entire application environment. An attacker could potentially steal user authentication tokens, gain access to sensitive business data, or manipulate the application's functionality to redirect users to phishing sites. The HTTP Referer header manipulation aspect is particularly concerning as it can be exploited without direct user interaction, making it a stealthy attack vector that can be triggered by simply visiting a malicious website or clicking on a compromised link. This vulnerability is classified under the ATT&CK framework as part of the T1059.007 technique, which involves the use of scripting languages for execution, and specifically targets the web application layer where user input is processed.
Mitigation strategies for CVE-2020-9016 should include immediate patching of the Dolibarr application to version 11.0.1 or later, which contains the necessary fixes for the XSS vulnerability. Organizations should also implement comprehensive input validation and output encoding mechanisms throughout their web applications, ensuring that all user-provided data is properly sanitized before being rendered in web pages. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded. Security teams should also conduct regular vulnerability assessments and penetration testing to identify similar weaknesses in other web applications. Network monitoring and web application firewalls can help detect and block malicious payloads attempting to exploit this vulnerability. Additionally, user education regarding the risks of clicking on suspicious links or visiting untrusted websites remains crucial in preventing successful exploitation of this type of vulnerability. The remediation process should also include reviewing and updating security policies to ensure that input validation is consistently applied across all application components and that proper security coding practices are followed during software development lifecycle activities.