CVE-2025-12811
📋 TL;DR
This CVE describes an HTTP request smuggling vulnerability in Delinea's Cloud Suite and Privileged Access Service products. Attackers could exploit inconsistent HTTP request parsing to bypass security controls, poison caches, or hijack user sessions. Organizations using affected versions of Delinea's Server Suite agents are vulnerable.
💻 Affected Systems
- Delinea Cloud Suite
- Delinea Privileged Access Service
⚠️ 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
Attackers could bypass authentication, access unauthorized privileged resources, poison web caches to serve malicious content, or perform session hijacking attacks against legitimate users.
Likely Case
Attackers could bypass security filters, access restricted resources, or perform cache poisoning attacks to manipulate content delivery.
If Mitigated
With proper network segmentation and updated agents, the attack surface is limited, though some risk remains if vulnerable components are exposed.
🎯 Exploit Status
HTTP request smuggling typically requires understanding of HTTP protocol nuances and target infrastructure, but tools exist to automate exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Server Suite 2023.1 (agent 6.0.1) or later, or Server Suite 2023.0.5 (agent 6.0.0-158), or Server Suite 2022.1.10 (agent 5.9.1-337)
Vendor Advisory: https://trust.delinea.com/?tcuUid=d512dd6a-fa40-421c-ac11-1be280b1cb83
Restart Required: Yes
Instructions:
1. Identify affected Server Suite agents. 2. Upgrade to Server Suite 2023.1 (agent 6.0.1) or later. 3. If unable to upgrade to 2023.1, upgrade to Server Suite 2023.0.5 (agent 6.0.0-158) or Server Suite 2022.1.10 (agent 5.9.1-337). 4. Restart services after upgrade.
🔧 Temporary Workarounds
Network segmentation and access control
allRestrict network access to Delinea services to only trusted sources and implement strict HTTP request validation at network boundaries.
🧯 If You Can't Patch
- Implement strict HTTP request validation at reverse proxies or load balancers
- Monitor for unusual HTTP traffic patterns and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check Server Suite agent version using the agent management interface or command line tools specific to your deployment.Check Version:
Specific command varies by deployment; consult Delinea documentation for agent version checking procedures.Verify Fix Applied:
Verify agent version is 6.0.1 or later, or 6.0.0-158, or 5.9.1-337, and test HTTP request handling with security scanning tools.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP request patterns, malformed HTTP headers, unexpected cache poisoning events, authentication bypass attempts
Network Indicators:
- HTTP requests with conflicting Content-Length and Transfer-Encoding headers, unusual request smuggling patterns
SIEM Query:
Search for HTTP requests with both Content-Length and Transfer-Encoding headers, or requests that trigger inconsistent parsing behavior.