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Grav EUVDEUVD-2025-200110

| CVE-2025-66300 HIGH
Path Traversal (CWE-22)
2025-12-01 security-advisories@github.com GHSA-p4ww-mcp9-j6f2
8.5
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 8.5 (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, A low privilege user account with page editing privilege can read any server files using "Frontmatter" form. This includes Grav user account files (/grav/user/accounts/*.yaml), which store hashed user password, 2FA secret, and the password reset token. This can allow an adversary to compromise any registered account by resetting a password for a user to get access to the password reset token from the file or by cracking the 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 8.5

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 8.5 HIGH
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:L

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
Changed
Confidentiality
High
Integrity
None
Availability
Low

Lifecycle Timeline

3
Patch released
Mar 15, 2026 - 13:34 nvd
Patch available
PoC Detected
Dec 03, 2025 - 15:45 vuln.today
Public exploit code
CVE Published
Dec 01, 2025 - 22:15 nvd
HIGH 8.5

Executive ViewAI

Why It Matters

A high-severity vulnerability in Grav CMS allows users with basic page editing permissions to access sensitive files, including encrypted user credentials and password reset tokens. This could enable unauthorized account takeover for any registered user, including administrators, affecting organizations running unpatched Grav instances.

Business Impact: High
Compensating Controls

Apply vendor patch. If immediate patching is not possible: restrict page editing permissions to trusted administrators only; implement Web Application Firewall rules to block access to /grav/user/accounts/ directory; segment Grav instances from production systems; monitor for unusual file access patterns in application logs; disable Frontmatter form processing if not business-critical.

Threat Intelligence Overview

EPSS Score
0.1%
Top 77% exploitable
Exploit
POC
Public exploit code exists
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 Yes
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
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

62
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: +20
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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