![Write-up: Exploiting Java deserialization with Apache Commons @ PortSwigger Academy | by Frank Leitner | Medium Write-up: Exploiting Java deserialization with Apache Commons @ PortSwigger Academy | by Frank Leitner | Medium](https://miro.medium.com/v2/resize:fit:843/1*ktkrMmMj3-3FwSAKdGd10w.png)
Write-up: Exploiting Java deserialization with Apache Commons @ PortSwigger Academy | by Frank Leitner | Medium
![Seeing lots of lock contention and CPU around sha512 computation during authentication · Issue #2700 · apache/accumulo · GitHub Seeing lots of lock contention and CPU around sha512 computation during authentication · Issue #2700 · apache/accumulo · GitHub](https://user-images.githubusercontent.com/1268739/168185353-963b506f-03f1-471e-b280-e57a5e586203.png)
Seeing lots of lock contention and CPU around sha512 computation during authentication · Issue #2700 · apache/accumulo · GitHub
![Text4Shell: A Vulnerability in Java library Apache Commons Text (CVE-2022-42889, Act4Shell) | LunaTrace Text4Shell: A Vulnerability in Java library Apache Commons Text (CVE-2022-42889, Act4Shell) | LunaTrace](https://www.lunasec.io/docs/img/blog/text4shell_small.png)
Text4Shell: A Vulnerability in Java library Apache Commons Text (CVE-2022-42889, Act4Shell) | LunaTrace
![Stack example shows feature locking (related code are all highlighted). | Download Scientific Diagram Stack example shows feature locking (related code are all highlighted). | Download Scientific Diagram](https://www.researchgate.net/publication/283431335/figure/fig5/AS:380035967012869@1467619043855/Stack-example-shows-feature-locking-related-code-are-all-highlighted.png)