File Browser is vulnerable to Stored Cross-site Scripting via crafted EPUB file
Priority HIGH 72CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the EPUB preview function in File Browser is vulnerable to Stored Cross-Site Scripting (XSS). JavaScript embedded in a crafted EPUB file executes in the victim's browser when they preview the file. This issue has been patched in version 2.62.2.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00327 25th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed filebrowser (filebrowser): 2.62.2github.com/filebrowser/filebrowser/v2 (Go): 2.62.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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 |
|---|---|---|---|---|---|
| filebrowser | filebrowser | before 2.62.2 | 2.62.2 | Patch available | CNA |
| — | github.com/filebrowser/filebrowser/v2 (Go) | before 2.62.2 | 2.62.2 | Patch available | GHSA-5vpr-4fgw-f69h |
- filebrowser Vendorfilebrowser Affected before 2.62.2 Fixed in 2.62.2 Patch available CNA
- github.com/filebrowser/filebrowser/v2 (Go) Vendor— Affected before 2.62.2 Fixed in 2.62.2 Patch available GHSA-5vpr-4fgw-f69h
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* | before 2.62.2 | Vulnerable | filebrowser |
- cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:* Versions before 2.62.2 Vulnerable ·filebrowser
Remediation
- Fix · CNA filebrowser (filebrowser) Fixed in 2.62.2
- Fix · GHSA-5vpr-4fgw-f69h github.com/filebrowser/filebrowser/v2 (Go) Fixed in 2.62.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34529
- 2026-10-03 Alias added: GHSA-5vpr-4fgw-f69h
References
More Filebrowser vulnerabilities
- TI-2026-25251 File Browser Self Registration Grants Any User Admin Access When Default Permissions Include Admin CVSS 4.0CRITICAL 10.0
- TI-2026-23305 File Browser: TUS Delete Endpoint Bypasses Delete Permission Check CVSS 3.1CRITICAL 9.1
- TI-2026-26777 File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution CVSS 3.1CRITICAL 9.8
- TI-2025-33000 File Browser vulnerable to command execution allowlist bypass CVSS 3.1HIGH 8.1
- TI-2026-23759 FileBrowser Quantum: Stored XSS in public share page via unsanitized share metadata (text/template misuse) CVSS 3.1HIGH 8.9
- TI-2023-20699 A cross-site scripting (XSS) vulnerability in FileBrowser before v2.23.0 allows an… CVSS 3.1CRITICAL 9.0
Sources
- CVE-2026-34529 · CVE Program
- CVE-2026-34529 · NVD
- FIRST EPSS
- GHSA-5vpr-4fgw-f69h · GitHub Advisory Database · CC BY 4.0
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