Vulnerability Description
Sliver is an open source cross-platform adversary emulation/red team framework, it can be used by organizations of all sizes to perform security testing. The reverse port forwarding in sliver teamserver allows the implant to open a reverse tunnel on the sliver teamserver without verifying if the operator instructed the implant to do so. The only impact that has been shown is the exposure of the server's IP address to a third party. This issue has been addressed in version 1.5.43 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bishopfox | Sliver | >= 1.5.26, < 1.5.43 |
Related Weaknesses (CWE)
References
- https://github.com/BishopFox/sliver/commit/0f340a25cf3d496ed870dae7da39eab4427bcPatch
- https://github.com/BishopFox/sliver/commit/10e245326070c6a5884a02e0790bb7e2baefbPatch
- https://github.com/BishopFox/sliver/security/advisories/GHSA-fh4v-v779-4g2wExploitVendor Advisory
FAQ
What is CVE-2025-27090?
CVE-2025-27090 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Sliver is an open source cross-platform adversary emulation/red team framework, it can be used by organizations of all sizes to perform security testing. The reverse port forwarding in sliver teamserv...
How severe is CVE-2025-27090?
CVE-2025-27090 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-27090?
Check the references section above for vendor advisories and patch information. Affected products include: Bishopfox Sliver.