cve/2020/CVE-2020-17531.md

### [CVE-2020-17531](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-17531)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20Tapestry&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=Apache%20Tapestry%204%3C%3D%204%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-502%20Deserialization%20of%20Untrusted%20Data&color=brighgreen)

### Description

A Java Serialization vulnerability was found in Apache Tapestry 4. Apache Tapestry 4 will attempt to deserialize the "sp" parameter even before invoking the page's validate method, leading to deserialization without authentication. Apache Tapestry 4 reached end of life in 2008 and no update to address this issue will be released. Apache Tapestry 5 versions are not vulnerable to this issue. Users of Apache Tapestry 4 should upgrade to the latest Apache Tapestry 5 version.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/154802388/CVE-2020-17531
- https://github.com/Live-Hack-CVE/CVE-2020-1753
- https://github.com/Live-Hack-CVE/CVE-2020-17531
- https://github.com/Live-Hack-CVE/CVE-2022-46366
- https://github.com/developer3000S/PoC-in-GitHub
- https://github.com/hectorgie/PoC-in-GitHub
- https://github.com/k0mi-tg/CVE-POC
- https://github.com/manas3c/CVE-POC
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/whoforget/CVE-POC
- https://github.com/youwizard/CVE-POC