CVE-2026-2222
Remote Cross-Site Scripting in Online Reviewer System
Publication date: 2026-02-09
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 |
|---|---|---|
| fabian | online_reviewer_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
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 identifying attempts to exploit the Cross-Site Scripting (XSS) flaw in the Online Reviewer System, specifically targeting the `firstname` parameter in HTTP POST requests to the file `/system/system/admins/manage/users/btn_functions.php`.'}, {'type': 'paragraph', 'content': 'A proof-of-concept exploit involves sending a POST request with the `firstname` parameter containing malicious JavaScript code such as `<img src=x onerror=alert(1)>`.'}, {'type': 'paragraph', 'content': 'To detect exploitation attempts on your network or system, you can monitor HTTP POST requests to the vulnerable endpoint and look for suspicious payloads in the `firstname` parameter.'}, {'type': 'list_item', 'content': 'Use network monitoring tools or web server logs to filter requests with the URI `/system/system/admins/manage/users/btn_functions.php`.'}, {'type': 'list_item', 'content': 'Search for POST requests containing suspicious script tags or event handlers in the `firstname` parameter, e.g., `<img src=x onerror=alert(1)>`.'}, {'type': 'list_item', 'content': "Example command using grep on web server logs: `grep '/system/system/admins/manage/users/btn_functions.php' /var/log/apache2/access.log | grep -i 'firstname=<img src=x onerror=alert(1)>'`"}, {'type': 'list_item', 'content': 'Use intrusion detection systems (IDS) or web application firewalls (WAF) with rules to detect XSS payloads targeting the `firstname` parameter.'}, {'type': 'list_item', 'content': 'Google dorking can be used to identify vulnerable targets with the query: `inurl:system/system/admins/manage/users/btn_functions.php`.'}] [1, 4]
Can you explain this vulnerability to me?
[{'type': 'paragraph', 'content': "CVE-2026-2222 is a Cross-Site Scripting (XSS) vulnerability found in the Online Reviewer System version 1.0, specifically in the file /system/system/admins/manage/users/btn_functions.php. The vulnerability occurs because the application does not properly sanitize or encode user input received via the firstname parameter. This allows an attacker to inject malicious JavaScript code that is executed in the victim's browser when the input is rendered, enabling arbitrary script execution within the user's session context."}, {'type': 'paragraph', 'content': 'The exploit can be performed remotely without requiring login or authorization, making it a critical security risk. A proof-of-concept payload uses the firstname parameter with malicious code such as <img src=x onerror=alert(1)>, demonstrating how the vulnerability can be triggered.'}] [1, 2, 4]
How can this vulnerability impact me? :
[{'type': 'paragraph', 'content': 'This vulnerability can have several negative impacts including session hijacking through cookie theft, unauthorized user actions, phishing attacks, website defacement, and redirection to malicious sites. These actions compromise user data privacy and the integrity of the application.'}, {'type': 'paragraph', 'content': "Because the vulnerability can be exploited remotely without authentication, attackers can easily execute malicious scripts in users' browsers, potentially leading to loss of sensitive information and unauthorized manipulation of the system."}] [1, 2, 4]
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
What immediate steps should I take to mitigate this vulnerability?
[{'type': 'paragraph', 'content': 'Immediate mitigation steps focus on preventing the execution of malicious scripts injected via the `firstname` parameter in the vulnerable file.'}, {'type': 'list_item', 'content': 'Implement context-aware output encoding to ensure all user-supplied data is properly encoded before rendering in HTML responses, such as HTML entity encoding.'}, {'type': 'list_item', 'content': 'Apply strict input validation with allowlists to filter out dangerous characters like `<`, `>`, `"`, `\'`, and `&` from user inputs.'}, {'type': 'list_item', 'content': 'Deploy a strong Content Security Policy (CSP) to restrict the sources of executable scripts and mitigate the impact of XSS attacks.'}, {'type': 'list_item', 'content': 'Set HttpOnly and Secure flags on cookies to prevent access to session tokens via JavaScript and protect against session hijacking.'}, {'type': 'list_item', 'content': 'Monitor and block suspicious requests targeting the vulnerable endpoint using web application firewalls or intrusion detection systems.'}, {'type': 'paragraph', 'content': 'Since the vulnerability can be exploited without login or authorization, these steps should be applied immediately to reduce risk.'}] [1, 2]