# qi4L/JYso

JNDIExploit or a ysoserial.

Repository: https://github.com/qi4L/JYso
Canonical: https://ross.abutalabs.com/products/jyso
Language: Java
License: GPL-3.0
License Family: copyleft
Topics: java, attack, jndi-injection, web-security, mem-shell, middleware-echo, jndi, ldap, rmi, gadget, ysoserial
Last push: 2026-06-14T04:33:48+00:00

## Health v2 (maintenance only)
Score: 83/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 87, release rhythm 69, longevity 100
- inputs: {"age_days": 1521, "days_push": 80, "days_rel": 125, "gap_med": 73, "n_releases_24m": 8}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1761, forks 191 (observed 2026-08-28T04:05:32.661651+00:00)

## What it is
JYso is a Java-based offensive security tool that combines the capabilities of ysoserial (Java deserialization gadget generation) and JNDIExploit (JNDI injection exploitation server). It includes bypasses for high-version JNDI restrictions, WAFs, and RASP, plus memory shell injection features.

## Use cases
- generate java deserialization gadget payloads
- exploit jndi injection vulnerabilities
- bypass jndi high version restrictions
- inject memory shells into java middleware
- bypass WAF and RASP during exploitation
- perform shiro deserialization attacks
- set up a malicious ldap or rmi server

## When to choose
- you need both ysoserial and JNDIExploit functionality in one tool
- you need to bypass JNDI high-version restrictions or RASP
- you want to deploy memory shells with customizable paths and headers

## When to avoid
- you need a defensive security or vulnerability scanning tool
- you are not working with Java deserialization or JNDI attack scenarios
- you need a fully GUI-driven tool (though it does offer GUI)

## Facets
- artifact type: cli-tool
- maturity: active
- function: penetration-testing, security
- domain: security, penetration-testing
- platform: jvm, cli, cross-platform
- tags: jndi-injection, ysoserial, java-deserialization, memshell, red-team, offensive-security, exploitation

## Member repositories
- qi4L/JYso (main) score 83

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:32.661651+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:27:12.248898+00:00, confidence not recorded.
  - readme: https://github.com/qi4L/JYso (fetched 2026-08-28T04:05:32.661651+00:00, sha a00c167de6b3)
- Data as of 2026-08-30T08:39:29.467469+00:00.