CVE-2021-3019

HIGH NUCLEI

lanproxy 0.1 - Path Traversal and Credential Exposure via config.properties

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 7 public exploits for CVE-2021-3019. PoCs published by 0xf4n9x, Maksim-venus, B1anda0. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains a functional Python script that exploits CVE-2021-3019, a directory traversal vulnerability in lanproxy, allowing arbitrary file read. The PoC sends crafted HTTP requests to read sensitive files like config.properties or other system files via path traversal.

Description

ffay lanproxy 0.1 allows Directory Traversal to read /../conf/config.properties to obtain credentials for a connection to the intranet.

Exploits (7)

nomisec WORKING POC 12 stars
by 0xf4n9x · poc
https://github.com/0xf4n9x/CVE-2021-3019

This repository contains a functional Python script that exploits CVE-2021-3019, a directory traversal vulnerability in lanproxy, allowing arbitrary file read. The PoC sends crafted HTTP requests to read sensitive files like config.properties or other system files via path traversal.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: lanproxy (version not specified)
No auth needed
Prerequisites: Network access to the vulnerable lanproxy instance
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 3 stars
by Maksim-venus · poc
https://github.com/Maksim-venus/CVE-2021-3019

This repository contains a functional exploit for CVE-2021-3019, a directory traversal vulnerability in lanproxy 0.1. The script reads a list of URLs from a file, attempts to access the vulnerable endpoint `/..%2Fconf%2Fconfig.properties`, and extracts admin credentials if the vulnerability is present.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: lanproxy 0.1
No auth needed
Prerequisites: List of target URLs in a text file
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SCANNER 3 stars
by B1anda0 · poc
https://github.com/B1anda0/CVE-2021-3019

This repository contains a Python script that scans for the Lanproxy directory traversal vulnerability (CVE-2021-3019) by attempting to access the 'config.properties' file. It verifies the presence of the vulnerability by checking for specific content in the response.

Classification
Scanner 90%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Lanproxy 0.1
No auth needed
Prerequisites: Target URL list in a text file
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC 1 stars
by murataydemir · poc
https://github.com/murataydemir/CVE-2021-3019

The repository provides a functional proof-of-concept for CVE-2021-3019, a directory traversal vulnerability in LanProxy 0.1. It includes a detailed HTTP request to exploit the vulnerability and retrieve sensitive configuration files containing credentials.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: LanProxy version 0.1
No auth needed
Prerequisites: Access to the vulnerable LanProxy server
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by a1665454764 · poc
https://github.com/a1665454764/CVE-2021-3019

This repository contains a functional exploit for CVE-2021-3019, a directory traversal vulnerability in Lanproxy 0.1. The PoC sends a crafted HTTP request to read arbitrary files (e.g., `/..%2Fconf%2Fconfig.properties`) and checks for the presence of 'admin' in the response to confirm vulnerability.

Classification
Working Poc 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Lanproxy 0.1
No auth needed
Prerequisites: Network access to the target Lanproxy instance
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec WORKING POC
by qiezi-maozi · poc
https://github.com/qiezi-maozi/CVE-2021-3019-Lanproxy

The repository contains a functional exploit for CVE-2021-3019, targeting a directory traversal vulnerability in Lanproxy. The PoC sends a crafted HTTP request to access sensitive files (e.g., config.properties) and can be extended to read arbitrary files.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: Lanproxy (version not specified)
No auth needed
Prerequisites: Network access to the target Lanproxy instance
devstral-2 · analyzed Feb 18, 2026 Full analysis →
nomisec SUSPICIOUS
by givemefivw · poc
https://github.com/givemefivw/CVE-2021-3019

The repository lacks exploit code and provides vague instructions in Chinese, directing users to add IPs to a file and run 'Cheeetah' without technical details or actual PoC code.

Classification
Suspicious 90%
Attack Type
Other
Complexity
Theoretical
Reliability
Theoretical
Target: unknown
No auth needed
Prerequisites: unknown
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Nuclei Templates (1)

ffay lanproxy Directory Traversal
HIGHby pikpikcu

References (2)

Core 2
Core References
Exploit, Third Party Advisory x_refsource_misc
https://github.com/maybe-why-not/lanproxy/issues/1

Scores

CVSS v3 7.5
EPSS 0.1898
EPSS Percentile 96.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-22
Status published
Products (1)
lanproxy_project/lanproxy 0.1
Published Jan 05, 2021
Tracked Since Feb 18, 2026