CVE-2026-1978
📋 TL;DR
A direct request vulnerability in kalyan02 NanoCMS up to version 0.4 allows attackers to remotely manipulate the /data/pagesdata.txt file through the User Information Handler component. This could lead to unauthorized access or modification of user information. All users running vulnerable versions of NanoCMS are affected.
💻 Affected Systems
- kalyan02 NanoCMS
📦 What is this software?
Nanocms by Kalyan02
⚠️ Risk & Real-World Impact
Worst Case
Attackers could modify user data, potentially leading to account takeover, data corruption, or unauthorized administrative access.
Likely Case
Unauthorized viewing or modification of user information stored in pagesdata.txt, potentially exposing sensitive data.
If Mitigated
Limited impact with proper access controls and monitoring in place, though the vulnerability still exists.
🎯 Exploit Status
The exploit is public and may be used, with remote exploitation possible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None provided
Restart Required: No
Instructions:
No official patch available. Consider upgrading if a newer version exists or implementing workarounds.
🔧 Temporary Workarounds
Restrict access to /data/pagesdata.txt
allConfigure web server to block direct requests to the vulnerable file
# Apache: Add to .htaccess
<Files "pagesdata.txt">
Order Allow,Deny
Deny from all
</Files>
# Nginx: Add to server block
location ~ /data/pagesdata.txt {
deny all;
}
Move sensitive data file
linuxRelocate pagesdata.txt outside web root directory
mv /path/to/webroot/data/pagesdata.txt /path/outside/webroot/
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the NanoCMS instance
- Enable detailed logging and monitoring for access attempts to /data/pagesdata.txt
🔍 How to Verify
Check if Vulnerable:
Check if NanoCMS version is 0.4 or earlier and if /data/pagesdata.txt is accessible via direct HTTP requestCheck Version:
Check NanoCMS configuration files or admin panel for version informationVerify Fix Applied:
Attempt to access /data/pagesdata.txt directly via browser or curl - should return 403/404 error📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /data/pagesdata.txt
- Unusual file access patterns in web server logs
Network Indicators:
- Unexpected GET/POST requests to the vulnerable endpoint
SIEM Query:
source="web_server_logs" AND (uri="/data/pagesdata.txt" OR uri LIKE "%/pagesdata.txt%")