These tasks originate from the reverse challenges at No Hack No CTF 2025 CTF
rvr
Team Vice-captain
Joined March 2024
Experties
About
Security enthusiast who enjoys understanding how things work. Specializes primarily in web category.
Last flag captured on Feb 23, 2026.
Achievements
Flags
213
Bloods
1
CTFs
75
Writeups
6
11
9
10
- These tasks originate from the Ezpz category at Grey Cat The Flag 2025
- Published on
- Name
- rvr
Hacking 4 webapps from Break The Syntax CTF 2025. The apps contain a number of different vulnerabilities: ldap injection, command injection, ssti, php type juggling and several privilege escalation techniques on Linux.- Published on
- Name
- rvr
Hacking a note-taking app from BITSCTF 2025. The exploit leverages a UTF-8 to ASCII conversion issue to inject XSS that remains unnoticed by DOMPurify and uses angular.js from Cloudflare CDN to bypass CSP restrictions.- These tasks originate from the WEB category at CTF Nullcon Goa HackIM 2025
- Published on
- Name
- rvr
The challenge involved crafting an XSS payload to extract a flag from an HTML tag, leveraging a vulnerability in the processing of uploaded .xlsx files and exploiting xmlattr vulnerability in Jinja2.
