CVE-2026-28158 in Do Lasso Plugin
Summary
by MITRE • 08/13/2026
Unauthenticated Cross Site Scripting (XSS) in Do Lasso <= 358 versions.
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Analysis
by VulDB Data Team • 08/13/2026
The vulnerability identified as unauthenticated cross site scripting in Do Lasso versions up to 358 represents a critical security flaw that allows attackers to execute malicious scripts in the context of a victim's browser without requiring authentication credentials. This weakness stems from insufficient input validation and output encoding mechanisms within the application's web interface, creating an environment where user-supplied data can be manipulated to inject harmful javascript code. The vulnerability affects the core functionality of the Do Lasso platform, which is designed for content management and collaborative work environments, making it particularly dangerous given its widespread use in enterprise settings.
The technical implementation of this XSS flaw occurs when the application fails to properly sanitize or encode user inputs before rendering them in web pages. Attackers can exploit this by submitting malicious payloads through various input vectors such as form fields, URL parameters, or API endpoints that are not adequately protected against script injection attempts. The vulnerability manifests when the application reflects user-provided content without proper sanitization, allowing attackers to craft scripts that execute in the context of other users' browsers. This type of vulnerability is classified under CWE-79 which specifically addresses cross site scripting flaws in web applications.
The operational impact of this vulnerability extends beyond simple script execution as it can enable attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and privilege escalation within the application environment. An attacker could potentially gain access to sensitive information stored within Do Lasso, manipulate content, or establish persistent access through stolen session tokens. The unauthenticated nature of this vulnerability means that any user with access to the application can exploit it without requiring valid credentials, significantly expanding the attack surface and making the vulnerability particularly attractive to threat actors. This weakness aligns with ATT&CK technique T1566 which covers social engineering tactics involving malicious payloads delivered through web applications.
Organizations using affected Do Lasso versions face substantial risk of data breaches and unauthorized access to their collaborative work environments. The vulnerability can be exploited through various attack vectors including phishing campaigns, compromised user accounts, or direct exploitation of the web interface. Security teams must consider implementing comprehensive input validation mechanisms, output encoding strategies, and regular security testing protocols to address this exposure. The recommended mitigation approach includes immediate patching to versions that have addressed the XSS vulnerability, implementing proper content security policies, and conducting thorough security assessments of all user-facing interfaces within the application ecosystem. Additionally, organizations should establish monitoring procedures to detect potential exploitation attempts and maintain up-to-date threat intelligence regarding similar vulnerabilities in related web applications.