GrandNode 4.40 LetsEncryptController.cs LetsEncryptController HTTP Requests path traversal

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in GrandNode 4.40. This issue affects the function LetsEncryptController of the file Controllers/LetsEncryptController.cs. The manipulation as part of HTTP Requests leads to path traversal. This vulnerability is traded as CVE-2019-12276. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GrandNode 4.40. This issue affects the function LetsEncryptController of the file Controllers/LetsEncryptController.cs. The manipulation as part of a HTTP Requests leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A Path Traversal vulnerability in Controllers/LetsEncryptController.cs in LetsEncryptController in GrandNode 4.40 allows remote, unauthenticated attackers to retrieve arbitrary files on the web server via specially crafted LetsEncrypt/Index?fileName= HTTP requests. A patch for this issue was made on 2019-05-30 in GrandNode 4.40.

The weakness was shared 06/05/2019. The identification of this vulnerability is CVE-2019-12276 since 05/22/2019. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47027). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

GrandNode

Version

4.40

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/22/2019 🔍
06/05/2019 +14 days 🔍
06/06/2019 +1 days 🔍
06/21/2025 +2207 days 🔍

Sourcesinfo

Advisory: 153373
Status: Confirmed

CVE: CVE-2019-12276 (🔍)
GCVE (CVE): GCVE-0-2019-12276
GCVE (VulDB): GCVE-100-136019
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/06/2019 08:31
Updated: 06/21/2025 21:37
Changes: 06/06/2019 08:31 (37), 06/19/2020 20:12 (17), 09/28/2023 08:39 (5), 06/21/2025 21:37 (25)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.