CVE-2025-27090

Public Exploit
Server-Side Request Forgery (SSRF) in sliver teamserver

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.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.15%
Vendor Advisory github.com
Affected: BishopFox sliver
Published at:
Updated at:

References

Link Tags
https://github.com/BishopFox/sliver/security/advisories/GHSA-fh4v-v779-4g2w exploit vendor advisory
https://github.com/BishopFox/sliver/commit/0f340a25cf3d496ed870dae7da39eab4427bc16f patch
https://github.com/BishopFox/sliver/commit/10e245326070c6a5884a02e0790bb7e2baefb3a1 patch

Frequently Asked Questions

What is the severity of CVE-2025-27090?
CVE-2025-27090 has been scored as a medium severity vulnerability.
How to fix CVE-2025-27090?
To fix CVE-2025-27090, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-27090 being actively exploited in the wild?
It is possible that CVE-2025-27090 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-27090?
CVE-2025-27090 affects BishopFox sliver.
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