h1-ctf: Grinchs website takendown with various other exploits

The HackyHolidays This is my first HackerOne CTF challenge writeup. Contents: flag1: Day 1 Check the files, robots.txt flag2: Day 2 one more : jquery.min.js flag3: Day 3 People Rater flag4: Day 4 Brute Force, Swag Shop flag5: Day 5 Brute Force, Secure Login flag6: Day 6 Brute Force, My Diary flag...

Nokogiri::XML::Schema trusts input by default, exposing risk of XXE vulnerability

Severity Nokogiri maintainers have evaluated this as Low Severity CVSS3 2.6. Description In Nokogiri versions = 1.11.0.rc3, XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. Th...

GHSA-VR8Q-G5C7-M54M Nokogiri::XML::Schema trusts input by default, exposing risk of XXE vulnerability

Severity Nokogiri maintainers have evaluated this as Low Severity CVSS3 2.6. Description In Nokogiri versions = 1.11.0.rc3, XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. Th...

h1-ctf: HackyHolidays 2020 Full Write-up: Information Disclosure of 12 Flags

Intro This is my report for the 2020 Hacky Holidays HackerOne CTF. I managed to find all 12 flags with the assistance of my little helper, Jake. He specialises in brute-forcing via a unique keyboard mashing technique: F1134543 Anywho, let's get started... Flag 1: Robots The first one was a nice...

h1-ctf: 12 Days of CTF Walkthroughs

h1-ctf: 12 Days of Hacky Holidays This is my writeup for 12 Days of Hacky Holidays. The report is written such that beginners to CTFs will be able to learn the tricks of the trade. The Mission: The Grinch has gone hi-tech this year with the intention of ruining the holidays 😱We need you to...

h1-ctf: A Visit from The Grinch ~ 'Twas the night before Hackmas...

Foreword This was an amazing CTF! The first from Hackerone that I've finished and one that I have enjoyed the most. Huge shout out to @adamtlangley for creating this downright poetic challenge. My whopping 20+ invitations are already being put to good use. Hacky Holidays and Merry Hackmas! Flag 1...

h1-ctf: Successfully took down the Grinch and saved the holidays from being ruined

Beginning ---------- HackerOne's official twitter account posted a tweet on 11th December announcing 12 days of hacky holidays where we have to take down the grinch and prevent him from ruining the Christmas holidays. F1132156 Challenge 1: Something to get started...

h1-ctf: Taking Grinch Down To Save Holidays

Hi thank you Hackerone and Adam for organizing the CTF, this had honestly helped me to learn good skills and techniques. The CTF began with the scope: hackyholidays.h1ctf.com and mission to take down grinch So here's a quick visual summary of all the challenges F1131175 F1131176 1. Grinch Robots ...

WHO COVID-19 Mobile App: Error Page Text Injection (no compromise)

Hi team! I want to report a context spoofing or text injection at http://hack.whocoronavirus.org/ 404 page Vulnerability Description : The http://hack.whocoronavirus.org/ scope allows users to inject any content on the 404 not found webpage Vulnerable Location :...

h1-ctf: Writeup Hackyholiday CTF

Hi there, Find my writeup on attached : F1128138 Thanks adam for making the CTF, Really PAIN for my head! Impact Hackerone Hoodie ? 😍😍...

Stripo Inc: Non-revoked API Key Disclosure in a Disclosed API Key Disclosure Report on Stripo

Summary: Can you imagine discovering an API key disclosure vulnerability in a disclosed API key disclosure report? The same thing is what I came across while going through the disclosed reports at Stripo Inc. Plus, the disclosed API key isn't even revoked, and therefore I am still able to use the...

Automattic: SQL Injection Union Based

Summary: Hello, I have found a SQL Injection Union Based on https://intensedebate.com/commenthistory/$YourSiteId The $YourSiteId into the url is vulnerable to SQL Injection. Steps to reproduce 1. Logging into https://intensedebate.com 2. After create your own site on...

HackerOne: Denial Of Service (Out Of Memory) on Updating Bounty Table [Urgent]

Hello, Summary: There is a bug in Updating Bounty Table section causing Denial Of Service , specifically loading up the memory usage Out Of Memory. This happens when you visit a corrupted bounty table of a target program. I didn't figure out yet how this issue happened but I am reporting it now...

HackerOne: Second-order SOQL injection through email and campaign name parameter in Salesforce lead submission

The HackerOne directory contains profiles of bug bounty and vulnerability disclosure programs that aren't managed on HackerOne. These profiles can be claimed by the organization that manages it. As part of this flow, they will need to enter an email address to confirm that affiliation with the...

Exploit for Path Traversal in Gitlab

CVE-2020-10977 GitLab 12.9.0 Arbitrary File Read Target...

ImpressCMS: Slack server disclose h1 private issue report

Summary ======= Upon browsing the https://www.impresscms.org/, one of the post include the public Slack Channel however the devel channel exposed some of the private h1 reports. Checking ImpressCMS hacktivity the issues that get resolved/reported are private which helps me to verify that the team...

HackerOne: Security@ email forwarding and Embedded Submission drafts can be used to obtain copy of deleted attachments from other HackerOne users

HackerOne has a number of ways for hackers to submit security vulnerabilities to a program, two of which are through an embedded submission form and through security@ email forwarding. These two features can be exploited to update a report draft created through security@ email forwarding that doe...

HackerOne: Indexing of urls on the "External link warning" pages discloses many vulnerable endpoints from the past and unlisted videos/photos

@nagli found a misconfiguration in an interstitial page that could lead to a link to be indexed by a 3rd party. This could have exposed links to proof of concepts that HackerOne users had posted on hackerone.com. This affected a specific set of customers, which HackerOne worked together with to...

HackerOne: Reflected XSS and possible SSRF/XXE on https://events.hackerone.com/conferences/get_recording_slides_xml.xml?url=myserver/xss.xml

@nagli found a reflected Cross-Site Scripting XSS, Server-Side Request Forgery SSRF, and XML External Entity XXE vulnerability in a 3rd party vendor that was used by HackerOne. This system did not contain any data related to reports submitted and stored on hackerone.com. HackerOne worked with the...

HackerOne: Open Redirect on http://events.hackerone.com/redirect?url=https://naglinagli.github.io

@nagli found an open redirect vulnerability in a 3rd party vendor that was used by HackerOne. This system did not contain any data related to reports submitted and stored on hackerone.com. HackerOne worked with the vendor to remediate the vulnerability. The report is partially disclosed to...