CVE-2006-6019 in Bloo
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in extensions/googiespell/googlespell_proxy.php in Bill Roberts Bloo 1.0 allows remote attackers to inject arbitrary web script or HTML via the lang parameter.
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Analysis
by VulDB Data Team • 04/28/2026
The vulnerability identified as CVE-2006-6019 represents a classic cross-site scripting flaw within the Bloo 1.0 content management system, specifically in the googlespell_proxy.php extension. This issue arises from inadequate input validation and sanitization mechanisms that fail to properly process user-supplied data before incorporating it into web responses. The vulnerability is particularly concerning as it affects a spell-checking component that is commonly used in web applications, making it an attractive target for attackers seeking to exploit web applications through client-side vector attacks.
The technical flaw manifests in the lang parameter of the googlespell_proxy.php file, which accepts user input without proper sanitization or encoding. When this parameter is processed and returned in the HTTP response without appropriate escaping mechanisms, malicious actors can inject arbitrary JavaScript code or HTML content that executes in the context of other users' browsers. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a critical security weakness in web applications. The specific implementation flaw allows attackers to bypass standard security controls by leveraging the legitimate spell-checking functionality to deliver malicious payloads.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it enables attackers to execute arbitrary code in the browsers of unsuspecting users. This capability can lead to session hijacking, credential theft, redirection to malicious sites, or the execution of additional attacks through the compromised user sessions. The vulnerability is particularly dangerous in environments where multiple users interact with the same application, as a single malicious input can compromise numerous user sessions. According to ATT&CK framework, this vulnerability maps to T1566.001 - Phishing via Social Engineering, as attackers can craft malicious inputs that appear legitimate within the spell-checking interface.
Mitigation strategies for this vulnerability should include immediate input validation and output encoding of all user-supplied parameters, particularly those used in dynamic content generation. The most effective remediation involves implementing proper HTML entity encoding for all output that incorporates user input, ensuring that special characters are properly escaped before being rendered in web pages. Additionally, developers should implement a whitelist-based approach for parameter validation, allowing only predefined safe values for the lang parameter. Security headers such as Content Security Policy should be implemented to further limit the execution of unauthorized scripts. The vulnerability also highlights the importance of regular security assessments and code reviews, particularly for third-party extensions that may not receive the same level of security scrutiny as core application components. Organizations should also consider implementing web application firewalls to detect and prevent exploitation attempts, while maintaining up-to-date security patches for all components of their web applications.