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CVE-2025-27090— Server-Side Request Forgery (SSRF) in sliver teamserver

Quick assessment

Affected
BishopFox sliver
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Sliver是Bishop Fox开源的一个开源的跨平台对手模拟/红队框架。可以被各种规模的组织用来执行安全测试。 Sliver存在代码问题漏洞，该漏洞源于反向端口转发未验证，导致服务器IP暴露。

AI Predicted 5.9 Difficulty: Easy EPSS 0.61% · P47

Possible ATT&CK Techniques 1 AI

T1571 · Non-Standard Port
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I. Basic Information for CVE-2025-27090

Vulnerability Information
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Vulnerability Title
Server-Side Request Forgery (SSRF) in sliver teamserver
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Sliver 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sliver是Bishop Fox开源的一个开源的跨平台对手模拟/红队框架。可以被各种规模的组织用来执行安全测试。 Sliver存在代码问题漏洞，该漏洞源于反向端口转发未验证，导致服务器IP暴露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
BishopFox sliver >= 1.5.26, < 1.5.43 -

II. Public POCs for CVE-2025-27090

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III. Intelligence Information for CVE-2025-27090

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Patches & Fixes for CVE-2025-27090 (2)

Vendor Advisories for CVE-2025-27090 (1)

IV. Related Vulnerabilities

Same product: sliver
Same vendor: BishopFox
Same weakness: CWE-918

V. Comments for CVE-2025-27090

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