Gokapi vulnerable to stored XSS via uploading file with malicious file name
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Gokapi is a self-hosted file sharing server with automatic expiration and encryption support. When using end-to-end encryption, a stored cross-site scripting vulnerability can be exploited by uploading a file with JavaScript code embedded in the filename. After upload and every time someone opens the upload list, the script is then parsed. Prior to version 2.0.0, there was no user permission system implemented, therefore all authenticated users were already able to see and modify all resources, even if end-to-end encrypted, as the encryption key had to be the same for all users using a version prior to 2.0.0. If a user is the only authenticated user using Gokapi, they are not affected. This issue has been fixed in v2.0.0. A possible workaround would be to disable end-to-end encryption.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Forceu | Gokapi | before 2.0.0 | 2.0.0 | Patch available | CNA |
| — | github.com/forceu/gokapi (Go) | 1.0.1 – 1.9.6 | — | No fix listed | GHSA-95rc-wc32-gm53 |
| — | github.com/forceu/gokapi (Go) | before 0.0.0-20250530191232-343cc566cfd7 | 0.0.0-20250530191232-343cc566cfd7 | Patch available | GHSA-95rc-wc32-gm53 |
- Gokapi VendorForceu Affected before 2.0.0 Fixed in 2.0.0 Patch available CNA
- github.com/forceu/gokapi (Go) Vendor— Affected 1.0.1 – 1.9.6 Fixed in — No fix listed GHSA-95rc-wc32-gm53
- github.com/forceu/gokapi (Go) Vendor— Affected before 0.0.0-20250530191232-343cc566cfd7 Fixed in 0.0.0-20250530191232-343cc566cfd7 Patch available GHSA-95rc-wc32-gm53
Remediation
- Fix · CNA Gokapi (Forceu) Fixed in 2.0.0
- Fix · GHSA-95rc-wc32-gm53 github.com/forceu/gokapi (Go) Fixed in 0.0.0-20250530191232-343cc566cfd7 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-48494
- 2026-10-03 Alias added: GHSA-95rc-wc32-gm53
References
Advisory 2
More Forceu Gokapi vulnerabilities
- TI-2026-22898 Gokapi: Stored XSS in SVG Hotlinks CVSS 3.1HIGH 8.7
- TI-2026-23780 Gokapi vulnerable to DoS in E2E Metadata Parser CVSS 3.1MEDIUM 6.5
- TI-2026-22897 Gokapi: Data Leak in Upload Status Stream CVSS 3.1MEDIUM 6.4
- TI-2026-23206 Gokapi: Privilege escalation via incomplete API-key permission revocation on user rank demotion CVSS 3.1MEDIUM 5.4
- TI-2026-23205 Gokapi: Privilege escalation with auth token CVSS 3.1MEDIUM 5.0
- TI-2025-30774 Gokapi has stored XSS vulnerability in friendly name for API keys CVSS 4.0MEDIUM 4.8
Sources
- CVE-2025-48494 · CVE Program
- CVE-2025-48494 · NVD
- FIRST EPSS
- GHSA-95rc-wc32-gm53 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences