CVE-2024-31027 in Open eClass
Summary
by MITRE • 09/29/2026
Cross Site Scripting vulnerability in Greek Universities Network (GUnet) Open eClass Platform v.3.15 allows a remote attacker to execute arbitrary code via the last name, first name, and username parameters in the user registration functionality.
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Analysis
by VulDB Data Team • 09/29/2026
The identified security flaw resides within the GUnet Open eClass platform version 3.15, specifically targeting the user registration module which is critical for onboarding new users into the educational ecosystem. This vulnerability manifests as a Cross-Site Scripting issue, classified under CWE-79 in the Common Weakness Enumeration standard. The root cause lies in insufficient input validation and sanitization of specific fields during account creation. When an attacker submits malicious script payloads through the last name, first name, or username parameters, the application fails to properly encode these inputs before rendering them on subsequent pages. This lack of proper output encoding allows the injected JavaScript code to execute within the context of a victim user's browser session rather than being treated as inert data by the web server.
From an operational perspective, this vulnerability poses significant risks to both individual users and the institutional infrastructure managed by Greek Universities Network institutions. An attacker can leverage this flaw to perform various malicious actions depending on the specific payload delivered. Common exploitation vectors include stealing session cookies or authentication tokens, which would allow the adversary to hijack active user sessions without needing valid credentials. Additionally, the vulnerability enables phishing attacks where the injected script redirects users to fraudulent login pages designed to capture sensitive information such as university IDs and passwords. In more severe scenarios, if combined with other vulnerabilities like Cross-Site Request Forgery, it could facilitate administrative actions or data exfiltration from within the protected network perimeter.
The exploitation of this vulnerability aligns with techniques documented in the MITRE ATT&CK framework, particularly under T1059 Command and Scripting Interpreter for executing arbitrary code via browser-based scripts, and potentially T1078 Valid Accounts if session hijacking leads to unauthorized access. The impact extends beyond simple defacement or annoyance; it compromises the confidentiality and integrity of user data within an academic environment that often handles sensitive personal information protected by regulations such as GDPR. Students, faculty members, and administrative staff are all potential targets, undermining trust in the digital learning platform provided by GUnet.
To mitigate this vulnerability, immediate remediation efforts must focus on implementing robust input validation and output encoding mechanisms across all user-facing forms within the registration workflow. Developers should enforce strict allow-listing for acceptable characters in name and username fields to prevent script injection at the source level. Furthermore, applying Content Security Policy headers can provide an additional layer of defense by restricting the sources from which scripts are allowed to execute. It is also recommended to enable HttpOnly flags on session cookies to mitigate the risk of cookie theft via JavaScript execution. Organizations utilizing this platform should apply any available patches or updates released by GUnet and conduct thorough security testing, including dynamic application security scanning, before deploying changes to production environments. Regular audits of third-party components integrated into the eClass platform are also advisable to ensure no other similar weaknesses exist in related modules.