CVEs-PoC/2021/CVE-2021-31805.md

### [CVE-2021-31805](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31805)
![](https://img.shields.io/static/v1?label=Product&message=Apache%20Struts&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-917%20Improper%20Neutralization%20of%20Special%20Elements%20used%20in%20an%20Expression%20Language%20Statement%20('Expression%20Language%20Injection')&color=brighgreen)

### Description

The fix issued for CVE-2020-17530 was incomplete. So from Apache Struts 2.0.0 to 2.5.29, still some of the tag’s attributes could perform a double evaluation if a developer applied forced OGNL evaluation by using the %{...} syntax. Using forced OGNL evaluation on untrusted user input can lead to a Remote Code Execution and security degradation.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpujul2022.html

#### Github
- https://github.com/0day404/vulnerability-poc
- https://github.com/20142995/Goby
- https://github.com/3SsFuck/CVE-2021-31805-POC
- https://github.com/ARPSyndicate/cvemon
- https://github.com/ARPSyndicate/kenzer-templates
- https://github.com/ArrestX/--POC
- https://github.com/Awrrays/FrameVul
- https://github.com/Axx8/Struts2_S2-062_CVE-2021-31805
- https://github.com/HimmelAward/Goby_POC
- https://github.com/KayCHENvip/vulnerability-poc
- https://github.com/Miraitowa70/POC-Notes
- https://github.com/Mr-xn/Penetration_Testing_POC
- https://github.com/NaInSec/CVE-PoC-in-GitHub
- https://github.com/SYRTI/POC_to_review
- https://github.com/Threekiii/Awesome-POC
- https://github.com/WhooAmii/POC_to_review
- https://github.com/Wrin9/CVE-2021-31805
- https://github.com/Z0fhack/Goby_POC
- https://github.com/aeyesec/CVE-2021-31805
- https://github.com/d4n-sec/d4n-sec.github.io
- https://github.com/fleabane1/CVE-2021-31805-POC
- https://github.com/izj007/wechat
- https://github.com/jax7sec/S2-062
- https://github.com/liang2kl/iot-exploits
- https://github.com/lions2012/Penetration_Testing_POC
- https://github.com/nomi-sec/PoC-in-GitHub
- https://github.com/nth347/CVE-2021-31805
- https://github.com/nu1r/yak-module-Nu
- https://github.com/pyroxenites/s2-062
- https://github.com/trganda/starrlist
- https://github.com/trhacknon/Pocingit
- https://github.com/whoami13apt/files2
- https://github.com/xuetusummer/Penetration_Testing_POC
- https://github.com/z92g/CVE-2021-31805
- https://github.com/zecool/cve