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Grav EUVDEUVD-2025-200082

| CVE-2025-66295 HIGH
Path Traversal (CWE-22)
2025-12-01 security-advisories@github.com GHSA-h756-wh59-hhjv
8.8
CVSS 3.1 · Vendor: github
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK

2 techniques across 2 tactics: Discovery, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

Sensitive files such as configuration files, credentials, or system files can be read, potentially leading to further compromise. With a CVSS score of 8.8 (HIGH), this represents a significant risk.

Exploit ScenarioDerived

An attacker modifies a file parameter to include directory traversal sequences (../../etc/passwd) to read arbitrary files from the server filesystem.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, when a user with privilege of user creation creates a new user through the Admin UI and supplies a username containing path traversal sequences (for example ..\Nijat or ../Nijat), Grav writes the account YAML file to an unintended path outside user/accounts/. The written YAML can contain account fields such as email, fullname, twofa_secret, and hashed_password. This vulnerability is fixed in 1.8.0-beta.27.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 13:34 CVSS 8.8

RemediationAI

A vendor patch is available — apply it immediately. Validate and sanitize file path inputs. Use a whitelist of allowed files or directories. Implement chroot jails or containerization.

Affected VersionsENISA

grav < 1.8.0-beta.27

Affected Packages

composer getgrav/grav fix: 1.8.0-beta.27
euvd grav fix: 1.8.0-beta.27

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in composer, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Path traversal allows an attacker to access files outside the intended directory by manipulating file paths with sequences like '../'.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (github) PRIMARY 8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (github) · only source for this CVE.

CVSS VectorVendor: github

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch released
Mar 15, 2026 - 13:34 nvd
Patch available
CVE Published
Dec 01, 2025 - 21:15 nvd
HIGH 8.8

Executive ViewAI

Why It Matters

A path traversal vulnerability in Grav CMS allows authenticated users with account creation privileges to write sensitive user credentials (passwords, two-factor secrets, email addresses) to arbitrary locations on the server filesystem. Organizations running Grav versions before 1.8.0-beta.27 face risk of credential exposure and potential system compromise if admin accounts are created by untrusted personnel.

Business Impact: High
Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Disable the user creation feature in the Admin UI until patching is complete; (2) restrict Admin UI access by IP whitelist or VPN; (3) implement filesystem integrity monitoring to detect unauthorized YAML files; (4) conduct daily audits of the user/accounts/ directory and parent directories for newly created YAML files.

Threat Intelligence Overview

EPSS Score
0.1%
Top 77% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

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