CVE-2026-2965: 07FLYCMS Cross-Site Scripting Vulnerability

CVE-2026-2965 Overview

A stored Cross-Site Scripting (XSS) vulnerability has been discovered in 07FLYCMS, 07FLY-CMS, and 07FlyCRM up to version 1.2.9. The vulnerability exists in the System Extension Module component, specifically within the /admin/SysModule/edit.html file. An attacker with administrative privileges can inject malicious scripts through the Title argument, which are then stored and executed when other users access the affected page. The exploit has been publicly disclosed and may be actively used for attacks. The vendor was contacted about this disclosure but did not respond.

Critical Impact

Authenticated attackers can inject persistent malicious scripts that execute in the context of other users' sessions, potentially leading to session hijacking, data theft, or unauthorized actions within the CMS administrative interface.

Affected Products

• 07FLYCMS up to version 1.2.9
• 07FLY-CMS up to version 1.2.9
• 07FlyCRM up to version 1.2.9

Discovery Timeline

• February 23, 2026 - CVE-2026-2965 published to NVD
• February 23, 2026 - Last updated in NVD database

Technical Details for CVE-2026-2965

Vulnerability Analysis

This vulnerability is classified as Stored Cross-Site Scripting (XSS), identified by CWE-79 (Improper Neutralization of Input During Web Page Generation). The flaw resides in the System Extension Module functionality of the 07FLYCMS family of products. When an administrator creates or modifies a system module through the /admin/SysModule/edit.html endpoint, the Title parameter fails to properly sanitize user-supplied input before storing it in the database and rendering it back to users.

The attack requires high privileges (administrative access) and user interaction for successful exploitation. While this limits the attack surface, the persistent nature of stored XSS makes it particularly dangerous as the malicious payload executes every time the affected page is loaded by any user with access to the administrative interface.

Root Cause

The root cause of this vulnerability is insufficient input validation and output encoding in the System Extension Module component. The application fails to sanitize the Title parameter before storing it in the database, and subsequently renders the unsanitized content without proper HTML entity encoding when displaying the module information. This allows JavaScript code embedded in the Title field to execute in the browser context of any user viewing the affected page.

Attack Vector

The attack is network-based and can be initiated remotely by an authenticated attacker with administrative privileges. The attacker must have access to the CMS administrative panel and the ability to modify system modules. The exploitation flow involves:

1. An attacker with admin credentials navigates to the System Extension Module edit page at /admin/SysModule/edit.html
2. The attacker injects malicious JavaScript code into the Title field
3. The malicious payload is stored in the application database
4. When any user (including other administrators) views the affected module, the stored script executes in their browser
5. The attacker can then steal session cookies, perform actions on behalf of the victim, or redirect users to malicious sites

The vulnerability has been publicly documented with analysis available through the Notion XSS Analysis page. Additional technical details are available at VulDB #347332.

Detection Methods for CVE-2026-2965

Indicators of Compromise

• Unusual JavaScript content in the Title field of system module entries in the database
• HTTP requests to /admin/SysModule/edit.html containing script tags or encoded JavaScript payloads
• Unexpected outbound connections from client browsers when accessing the System Extension Module pages
• Modified system module records with suspicious HTML or JavaScript content

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in POST requests to /admin/SysModule/edit.html
• Monitor database entries for the system modules table for content containing <script>, javascript:, onerror=, or other common XSS vectors
• Deploy Content Security Policy (CSP) headers to detect and report inline script execution attempts
• Use application-level logging to track modifications to system module configurations

Monitoring Recommendations

• Enable detailed logging for all administrative actions within the CMS, particularly module creation and modification operations
• Configure alerts for any database queries that insert or update records containing HTML tags or JavaScript content
• Monitor network traffic for unusual patterns following access to the administrative interface
• Regularly audit system module entries for unexpected content or recent unauthorized modifications

How to Mitigate CVE-2026-2965

Immediate Actions Required

• Restrict administrative access to trusted users only and implement multi-factor authentication for admin accounts
• Audit all existing system module entries for malicious content and remove any suspicious payloads
• Implement network-level controls to limit access to the administrative interface from trusted IP ranges only
• Deploy a Web Application Firewall with XSS protection rules enabled for the affected endpoints

Patch Information

No official patch has been released by the vendor. The vendor was contacted about this vulnerability disclosure but did not respond. Users should monitor for updates from the 07FLYCMS project and apply security patches as soon as they become available. Consider migrating to an actively maintained CMS solution if the vendor continues to be unresponsive to security disclosures.

Workarounds

• Implement server-side input validation to sanitize the Title parameter, stripping or encoding HTML special characters before storage
• Apply output encoding (HTML entity encoding) when rendering the Title field in the administrative interface
• Deploy Content Security Policy headers with strict script-src directives to prevent inline script execution
• Consider implementing a custom security module or using a reverse proxy to filter XSS payloads before they reach the application

# Example Apache mod_security rule to block XSS attempts
SecRule ARGS:Title "@rx <script|javascript:|onerror=|onclick=" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'Potential XSS attempt in Title parameter',\
    log,\
    auditlog"