CVE-2025-27090: bishopfox sliver Server-Side Request Forgery (SSRF)

Vulnerability summary

CVE-2025-27090 is a medium (CVSS 6.9) Server-Side Request Forgery (SSRF) vulnerability in bishopfox sliver. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 19-02-2025
   PublishedVulnerability first disclosed.
2. 19-02-2025
   Last modifiedVulnerability information updated.

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.

• CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.