CVE-2025-2506
📋 TL;DR
This vulnerability allows users with only CONNECT permissions to a database configured for replication to execute pglogical commands and gain unauthorized read access to replicated tables. It affects systems running pglogical 3.x (EDB proprietary) or BDR/PGD 4 and 5 where replication is configured. Attackers need specific knowledge of pglogical3/BDR commands and binary protocol decoding.
💻 Affected Systems
- pglogical 3.x (EDB proprietary)
- BDR/PGD 4
- BDR/PGD 5
⚠️ 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
Unauthorized users gain read access to sensitive replicated data, potentially exposing confidential information or intellectual property.
Likely Case
Privileged database users with CONNECT access but not table read permissions can access replicated tables they shouldn't see.
If Mitigated
Minimal impact if proper network segmentation, authentication controls, and least privilege principles are implemented.
🎯 Exploit Status
Requires CONNECT permissions, knowledge of pglogical3/BDR specific commands, and ability to decode binary protocol.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check EDB advisory for specific patched versions
Vendor Advisory: https://www.enterprisedb.com/docs/security/advisories/cve20252506/
Restart Required: Yes
Instructions:
1. Review EDB advisory for patched versions. 2. Apply the appropriate patch for your pglogical/BDR version. 3. Restart PostgreSQL service. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Restrict CONNECT permissions
allLimit CONNECT permissions to only trusted users on databases configured for replication
REVOKE CONNECT ON DATABASE database_name FROM untrusted_user;
Network segmentation
allIsolate replication traffic and restrict access to replication ports
🧯 If You Can't Patch
- Implement strict least privilege - only grant CONNECT permissions to absolutely necessary users
- Monitor for unusual pglogical/BDR command execution patterns and audit database connections
🔍 How to Verify
Check if Vulnerable:
Check if running affected pglogical/BDR versions and if replication is configured with users having CONNECT permissionsCheck Version:
SELECT * FROM pg_available_extensions WHERE name LIKE '%pglogical%' OR name LIKE '%bdr%';Verify Fix Applied:
Verify patched version is installed and test that users with only CONNECT permissions cannot execute pglogical replication commands📡 Detection & Monitoring
Log Indicators:
- Unauthorized pglogical command execution attempts
- Replication connection attempts from unauthorized users
Network Indicators:
- Unexpected connections to replication ports
- pglogical/BDR protocol traffic from unauthorized sources
SIEM Query:
source="postgresql" AND (message LIKE "%pglogical%" OR message LIKE "%replication%" OR message LIKE "%BDR%") AND user NOT IN (trusted_users_list)