CVE-2025-12866
📋 TL;DR
CVE-2025-12866 is a critical authentication bypass vulnerability in EIP Plus software developed by Hundred Plus. It allows unauthenticated remote attackers to brute-force or predict password reset links, enabling them to reset any user's password and gain unauthorized access. All organizations using vulnerable versions of EIP Plus are affected.
💻 Affected Systems
- EIP Plus
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user accounts, including administrative accounts, leading to full system takeover, data exfiltration, and potential ransomware deployment.
Likely Case
Attackers reset passwords for multiple user accounts, gain unauthorized access to sensitive business data, and potentially escalate privileges within the system.
If Mitigated
Limited to unsuccessful brute-force attempts if rate limiting and strong link generation are properly implemented.
🎯 Exploit Status
The vulnerability involves brute-forcing or predicting reset links, which requires minimal technical skill. No public exploit code is mentioned in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-10491-004b0-2.html
Restart Required: No
Instructions:
1. Contact Hundred Plus for the latest patched version. 2. Apply the vendor-provided patch. 3. Test the password recovery functionality to ensure it generates cryptographically secure, unpredictable reset links.
🔧 Temporary Workarounds
Disable Password Recovery
allTemporarily disable the password recovery functionality until patching is complete
Configuration change in EIP Plus admin interface
Implement Rate Limiting
allConfigure rate limiting on password reset endpoints to prevent brute-force attacks
Configure web server or application firewall rules
🧯 If You Can't Patch
- Isolate EIP Plus instances behind VPN or strict network access controls
- Implement multi-factor authentication for all user accounts to mitigate password reset impact
🔍 How to Verify
Check if Vulnerable:
Test password recovery functionality: request password reset and check if reset links appear predictable or sequentialCheck Version:
Check EIP Plus version through admin interface or contact vendorVerify Fix Applied:
After patching, verify that password reset links are cryptographically random and cannot be predicted📡 Detection & Monitoring
Log Indicators:
- Multiple failed password reset attempts from single IP
- Unusual password reset success patterns
- Password reset requests for multiple users in short timeframe
Network Indicators:
- High volume of requests to password reset endpoints
- Patterned requests to reset link URLs
SIEM Query:
source="eip_plus_logs" AND (event="password_reset_request" AND count > 10 per source_ip within 5min)