CVE-2023-5555 in lms
Summary
by MITRE • 10/25/2023
Cross-site Scripting (XSS) - Generic in GitHub repository frappe/lms prior to 5614a6203fb7d438be8e2b1e3030e4528d170ec4.
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Analysis
by VulDB Data Team • 10/03/2025
This vulnerability represents a cross-site scripting flaw that affects the frappe/lms repository version prior to commit 5614a6203fb7d438be8e2b1e3030e4528d170ec4. The issue manifests as a generic XSS vulnerability that allows malicious actors to inject client-side scripts into web applications. The vulnerability stems from insufficient input validation and output encoding mechanisms within the application's handling of user-provided data. When users interact with the vulnerable application, any unfiltered input can be executed in the context of other users' browsers, creating a persistent security risk.
The technical exploitation of this vulnerability occurs when user-supplied data is directly rendered in web pages without proper sanitization or encoding. This allows attackers to inject malicious scripts that can capture user sessions, steal sensitive information, or perform unauthorized actions on behalf of victims. The flaw exists across multiple input vectors within the repository's codebase, making it particularly dangerous as it can be triggered through various user interaction points. The vulnerability is classified under CWE-79 which specifically addresses cross-site scripting attacks where improper validation of input allows execution of malicious scripts.
The operational impact of this vulnerability extends beyond simple script execution as it can lead to complete session hijacking, data theft, and potential privilege escalation. Attackers can leverage this flaw to impersonate legitimate users and gain access to restricted resources or sensitive information. The vulnerability affects the entire user base of the affected application, making it a critical security concern for any organization relying on the frappe/lms platform. The risk is amplified by the fact that XSS vulnerabilities often remain undetected for extended periods, allowing attackers to exploit them repeatedly.
Mitigation strategies for this vulnerability involve implementing comprehensive input validation and output encoding mechanisms throughout the application. Developers should adopt proper sanitization techniques to ensure all user-provided data is properly escaped before rendering in web pages. The fix requires updating the application to version 5614a6203fb7d438be8e2b1e3030e4528d170ec4 or applying the relevant patches that address the input validation gaps. Organizations should also implement content security policies to limit script execution and regularly audit their code for similar vulnerabilities. This remediation aligns with ATT&CK technique T1531 which focuses on establishing persistence through malicious script injection and T1059 which covers command and scripting interpreter techniques. The vulnerability demonstrates the importance of following secure coding practices and maintaining up-to-date security measures in web applications.