CVE-2025-11440
📋 TL;DR
This vulnerability in JhumanJ OpnForm up to version 1.9.3 allows improper access controls via the /edit endpoint, potentially enabling unauthorized access to sensitive functions. The attack can be executed remotely, affecting all users running vulnerable versions. Public disclosure increases the risk of exploitation.
💻 Affected Systems
- JhumanJ OpnForm
📦 What is this software?
Opnform by Jhumanj
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized users could modify form data, access administrative functions, or compromise form integrity leading to data manipulation or exposure.
Likely Case
Limited unauthorized access to edit functions, potentially allowing form tampering or data integrity issues.
If Mitigated
With proper access controls and network segmentation, impact would be limited to isolated form editing functions.
🎯 Exploit Status
Exploit details are publicly disclosed but no proof-of-concept code is confirmed. Attack requires understanding of the /edit endpoint manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after commit b15e29021d326be127193a5dbbd528c4e37e6324
Vendor Advisory: https://github.com/JhumanJ/OpnForm/pull/900/commits/b15e29021d326be127193a5dbbd528c4e37e6324
Restart Required: No
Instructions:
1. Update OpnForm to version after commit b15e29021d326be127193a5dbbd528c4e37e6324. 2. Apply the patch from the GitHub pull request #900. 3. Verify the fix by checking that the /edit endpoint has proper access controls.
🔧 Temporary Workarounds
Restrict access to /edit endpoint
allUse web server configuration to block or restrict access to the vulnerable /edit endpoint
# For Apache: add to .htaccess
<Location "/edit">
Order deny,allow
Deny from all
</Location>
# For Nginx: add to server block
location /edit {
deny all;
}
Implement network access controls
allRestrict network access to OpnForm installation to trusted IP addresses only
# Example firewall rule (Linux iptables)
iptables -A INPUT -p tcp --dport [OPNFORM_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [OPNFORM_PORT] -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate OpnForm from untrusted networks
- Deploy a web application firewall (WAF) with rules to detect and block /edit endpoint manipulation
🔍 How to Verify
Check if Vulnerable:
Check if OpnForm version is 1.9.3 or earlier and the /edit endpoint is accessible without proper authentication.Check Version:
Check OpnForm configuration files or use: grep -r "version" /path/to/opnform/installation/Verify Fix Applied:
Verify that the commit b15e29021d326be127193a5dbbd528c4e37e6324 is present in your installation and test that unauthorized access to /edit endpoint is properly blocked.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /edit endpoint
- HTTP 403 or authentication failure logs for /edit requests
- Unusual form modification activity
Network Indicators:
- Unusual traffic patterns to /edit endpoint
- Requests to /edit from unexpected IP addresses
SIEM Query:
source="web_logs" AND (url="/edit" AND (response_code=200 OR response_code=403)) AND user="anonymous"🔗 References
- https://docs.google.com/document/d/1GUjJA9vUbsXUngAv6ySsbCIhVynf8_djardLZYEDOe0/edit?tab=t.0#heading=h.t78mmp24qqk5
- https://github.com/JhumanJ/OpnForm/pull/900/commits/b15e29021d326be127193a5dbbd528c4e37e6324
- https://vuldb.com/?ctiid.327377
- https://vuldb.com/?id.327377
- https://vuldb.com/?submit.666881
- https://docs.google.com/document/d/1GUjJA9vUbsXUngAv6ySsbCIhVynf8_djardLZYEDOe0/edit?tab=t.0#heading=h.t78mmp24qqk5
