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CVE-2026-28683— Gokapi: Stored XSS in SVG Hotlinks

Quick assessment

Affected
Forceu Gokapi
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Gokapi是Marc Bulling个人开发者的一个轻量级的自托管Firefox发送替代方案。 Gokapi 2.2.3之前版本存在跨站脚本漏洞，该漏洞源于恶意经过身份验证的用户上传SVG并创建热链接，可能导致存储型跨站脚本攻击。

CVSS 8.7 · High EPSS 0.25% · P15
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I. Basic Information for CVE-2026-28683

Vulnerability Information
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Vulnerability Title
Gokapi: Stored XSS in SVG Hotlinks
Source: CVE Program / CVE List V5
Vulnerability Description
Gokapi is a self-hosted file sharing server with automatic expiration and encryption support. Prior to version 2.2.3, if a malicious authenticated user uploads SVG and creates a hotlink for it, they can achieve stored XSS. This issue has been patched in version 2.2.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Gokapi 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gokapi是Marc Bulling个人开发者的一个轻量级的自托管Firefox发送替代方案。 Gokapi 2.2.3之前版本存在跨站脚本漏洞，该漏洞源于恶意经过身份验证的用户上传SVG并创建热链接，可能导致存储型跨站脚本攻击。
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
Forceu Gokapi < 2.2.3 -

II. Public POCs for CVE-2026-28683

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 5785 chars
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Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-28683

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Vendor Advisories for CVE-2026-28683 (1)

Other References for CVE-2026-28683 (1)

Same Patch Batch · Forceu · 2026-03-06 · 5 CVEs total

CVE-2026-28682 6.4 MEDIUM Gokapi: Data Leak in Upload Status Stream
CVE-2026-29061 5.4 MEDIUM Gokapi: Privilege escalation via incomplete API-key permission revocation on user rank dem
CVE-2026-29060 5.0 MEDIUM Gokapi: Privilege escalation with auth token
CVE-2026-29084 4.6 MEDIUM Gokapi: CSRF in Login Endpoint

IV. Related Vulnerabilities

Same product: Gokapi
Same vendor: Forceu
Same weakness: CWE-79

V. Comments for CVE-2026-28683

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