guelfoweb Knockpy 4.1.1 Server Response csv injection

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in guelfoweb Knockpy 4.1.1. This vulnerability affects unknown code of the component Server Response Handler. Such manipulation leads to csv injection. This vulnerability is documented as CVE-2020-36941. The attack can be executed remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in guelfoweb Knockpy 4.1.1. It has been rated as critical. Affected by this issue is some unknown functionality of the component Server Response Handler. The manipulation with an unknown input leads to a csv injection vulnerability. Using CWE to declare the problem leads to CWE-1236. The product saves user-provided information into a Comma-Separated Value (CSV) file, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as a command when the file is opened by a spreadsheet product. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Knockpy 4.1.1 contains a CSV injection vulnerability that allows attackers to inject malicious formulas into CSV reports through unfiltered server headers. Attackers can manipulate server response headers to include spreadsheet formulas that will execute when the CSV is opened in spreadsheet applications.

The weakness was released by Dolev Farhi as 49342. The advisory is shared for download at exploit-db.com. This vulnerability is handled as CVE-2020-36941 since 01/25/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available.

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

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2020-30859). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Csv injection
CWE: CWE-1236 / CWE-74 / CWE-707
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: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/25/2026 CVE reserved
01/27/2026 +2 days Advisory disclosed
01/27/2026 +0 days VulDB entry created
03/24/2026 +56 days VulDB entry last update

Sourcesinfo

Advisory: 49342
Researcher: Dolev Farhi
Status: Not defined

CVE: CVE-2020-36941 (🔒)
GCVE (CVE): GCVE-0-2020-36941
GCVE (VulDB): GCVE-100-343016
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/27/2026 17:10
Updated: 03/24/2026 22:50
Changes: 01/27/2026 17:10 (78), 01/28/2026 21:29 (1), 03/24/2026 22:50 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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