CVE-2026-2939
Cross-Site Scripting in itsourcecode SMS Add Student Module
Publication date: 2026-02-22
Last updated on: 2026-04-29
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| itsourcecode | student_management_system | 1.0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
| CWE-94 | The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': "CVE-2026-2939 is a Stored Cross-Site Scripting (XSS) vulnerability found in the ITSOURCECODE Student Management System version 1.0, specifically in the Add Student module's profile picture upload functionality."}, {'type': 'paragraph', 'content': 'The vulnerability occurs because the system allows administrative users to upload SVG files without proper validation or sanitization. Since SVG files are XML-based and can embed JavaScript code, a malicious actor can upload an SVG containing harmful JavaScript.'}, {'type': 'paragraph', 'content': 'This malicious JavaScript payload is stored on the server and executes whenever the profile picture is accessed or viewed in a browser, including when previewed or opened in a new tab within the Manage Student module.'}, {'type': 'paragraph', 'content': 'The flaw arises from improper neutralization of user-controllable input before it is included in web page output, leading to CWE-79 (Improper Neutralization of Input During Web Page Generation).'}, {'type': 'paragraph', 'content': 'Exploitation requires some level of user interaction and authentication (admin login), but the attack can be launched remotely. A proof-of-concept exploit is publicly available.'}] [1, 3, 4]
How can this vulnerability impact me? :
This vulnerability allows attackers to execute arbitrary JavaScript code in the context of the application, leading to several security risks.
- Hijacking authenticated administrative sessions.
- Performing unauthorized actions within the application.
- Stealing sensitive data or credentials.
- Defacing content or injecting malicious content.
- Delivering phishing or malware payloads to users.
Because the malicious payload is stored and executed when the profile picture is viewed, any authenticated user accessing the affected module could be impacted.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
[{'type': 'paragraph', 'content': 'This vulnerability can be detected by testing the Add Student module, specifically the /add_student/ endpoint, for improper handling of SVG file uploads that contain embedded JavaScript. Since the vulnerability involves stored cross-site scripting via malicious SVG uploads, detection involves attempting to upload SVG files with script payloads and observing if the scripts execute when the profile picture is viewed.'}, {'type': 'paragraph', 'content': 'Detection commands or steps may include:'}, {'type': 'list_item', 'content': 'Using curl or similar tools to upload an SVG file containing a simple JavaScript payload to the /add_student/ endpoint as an authenticated admin user.'}, {'type': 'list_item', 'content': 'Monitoring HTTP responses and application behavior to see if the payload is stored and executed when accessing the student profile picture.'}, {'type': 'list_item', 'content': 'Example curl command to upload a malicious SVG (authentication and exact parameters depend on the application):'}, {'type': 'list_item', 'content': 'curl -X POST -F "[email protected]" -F "other_fields=values" https://target-system/add_student/ -b cookie.txt'}, {'type': 'list_item', 'content': 'After upload, access the Manage Student module or directly open the uploaded SVG image in a browser to check for script execution.'}, {'type': 'paragraph', 'content': 'Since the exploit requires authentication and user interaction, detection also involves verifying if the system properly sanitizes SVG uploads and restricts script execution.'}] [1, 3, 4]
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': "Immediate mitigation steps for this vulnerability include preventing the upload and execution of malicious SVG files in the Add Student module's profile picture upload feature."}, {'type': 'list_item', 'content': 'Disallow SVG file uploads entirely if they are not necessary for the application.'}, {'type': 'list_item', 'content': 'If SVG uploads are required, sanitize SVG files server-side using trusted libraries to remove <script> tags and event handlers that can execute JavaScript.'}, {'type': 'list_item', 'content': 'Enforce strict Content-Type and MIME type validation on uploaded files to ensure only allowed file types are accepted.'}, {'type': 'list_item', 'content': 'Store uploaded files outside the web root directory and serve them with safe headers to prevent direct script execution.'}, {'type': 'list_item', 'content': 'Implement a strong Content Security Policy (CSP) to restrict the execution of inline scripts and reduce the impact of any injected scripts.'}, {'type': 'list_item', 'content': 'Validate and sanitize all user-uploaded content on the server side before storing or rendering.'}, {'type': 'paragraph', 'content': 'If possible, consider replacing the affected product or applying vendor patches once available, as no known countermeasures or official fixes have been identified yet.'}] [1, 4]