Node.js third-party modules: Prototype pollution attack in just-extend

I would like to report a prototype pollution vulnerability in just-extend It allows an attacker to inject properties on Object.prototype. Module module name: just-extend version: 2.1.0, and 3.0.0 npm page: https://www.npmjs.com/package/just-extend Module Description Part of a library of...

Pentagon Expands Bug-Bounty Program to Include Physical Systems

The Department of Defense is expanding its “Hack the Pentagon” bug-bounty program to include hardware assets, tapping the Synack, HackerOne and Bugcrowd platforms to attract more white hats to the effort. The news comes two weeks after the Government Accountability Office GAO released a report...

HackerOne: Proper verification is not done before sending invitations to researchers for certain private programs with rules e.g. "Participants must be US-based"

Hi, I would like to report something I just recently noticed upon receiving an automated invite from Hackerone for a private program. The program brief clearly states the following in program rules: █████ This is where I believe the issue is. I live in ███ and according to the program rules I...

Tumblr Privacy Bug Could Have Exposed Sensitive Account Data

Tumblr on Wednesday disclosed it had fixed a vulnerability that could have exposed sensitive account information including usernames/passwords and individual IP addresses. However, the company stressed there’s no evidence that any data was exposed. The bug existed in the “Recommended Blogs” featu...

Prototype Pollution

Overview All versions of merge-options are vulnerable to Prototype Pollution Recommendation Update to version 1.0.1 or greater. References - HackerOne Report - GitHub Commit - GitHub Advisory...

Prototype Pollution

Overview All versions of merge-objects are vulnerable to Prototype Pollution. Recommendation No fix is available for this vulnerability at this time. It is our recommendation to use an alternative package. References - HackerOne Report - GitHub Advisory...

Prototype Pollution

Overview All versions of merge-recursive are vulnerable to Prototype Pollution. When malicious user input is merged with another object it allows the attacker to modify the prototype of Object via proto causing the addition or modification of an existing property. Proof of concept: var merge =...

Chaturbate: Passive stored XSS at broadcast room

The hacker found that a specially crafted app names could insert a small amount of data into an A tag's href in the "Broadcaster is running these apps: " chat text. Because of the character limit this required multiple successive clicks on different app names, and in the example utilised the room...

HackerOne: Improper UUID validation results in bypass of #419896

This was found while evaluating the vulnerability and patch identified in 419896. I determined the deployed patch to be effective. However, I noticed tracer values could be sent which didn't conform to the UUID specification as characters outside of the a-f and 0-9 ranges could be used. For...

HackerOne: Unauthenticated user can upload an attachment to the last updated report draft

The newly launched beta embedded submissions form introduced the concept of anonymous submissions. When an anonymous user starts writing a report through an embedded form, a UUID will be generated to track their submission. Any object that is created will reference this UUID. We call this a trace...

HackerOne: Hacker can bypass 2FA requirement and reporter blacklist through embedded submission form

Hi Team, Summary: A program owner can enforce the hackers to setup the two-factor authentication before submitting new reports to their program here: https://hackerone.com/parrotsec/submissionrequirements see below image F355169 The Parrot Sec program has this feature enabled to enforce the hacke...

h1-5411-CTF: H1-5411 CTF Writeup

So, Hackerone posted a tweet about the Meme CTF Where barcode was in the tweet image by scanning it and decoding from hex I found this link : https://h1-5411.h1ctf.com/ where we can create/generate a memes and for generating the meme this was used form GitHub which i found in source code analysis...

See how I found Yahoo Mail APP stored XSS vulnerability-vulnerability warning-the black bar safety net

! Today I want to share is to participate in Yahoo（Yahoo!） Vulnerability all test items to find the one on Yahoo Mail iOS app vulnerability, and ultimately, by virtue of the vulnerability, I go into the Yahoo security Hall of Fame and get a$3500 dollar reward. Vulnerability case My test object is...

h1-5411-CTF: Solution for h15411's CTF challenge

Baby steps Earlier today a friend tipped me off about an ongoing CTF challenge that was being run by HackerOne and would get the first ten winners a ticket to participate in h15411, which will be a live-hacking event happening in Buenos Aires. This immediately caught my attention and I decided to...

Brave Software: chrome://brave can still be navigated to, leading to RCE

Summary: 'chrome://brave' can be navigated to using the middle mouse click or normal click with CTRL held IFF coming from a bookmark. I am also using a small bug to actually trick a user into bookmarking our crafted URL through drag and drop. Products affected: Brave: 0.24.0 V8: 6.9.427.23 rev:...

h1-5411-CTF: H1-5411 CTF Write-up by erbbysam and ziot

@erbbysam and I recently set out to beat the latest CTF challenge hosted by HackerOne. Here is a write-up with the process we took from start to finish. The h1-5411 CTF begins with a tweet from HackerOne: https://twitter.com/Hacker0x01/status/1044974142150373378 F351665 This leads to a website...

HackerOne: Hacker can request mediation for published reports

Hi team, @jobert Summary: After creating the publish report, we do not have a field to send the requested meditation from HackerOne Support Description: Steps To Reproduce 1. Create publish report for any program ████████ 2. Use query https://hackerone.com/reports/numberpublishreport/hackerhelp M...

HackerOne: User with privilege to maintain External Programs can update certain churned HackerOne programs

Summary: You wrote that some programs are behind, but you are trying to get them back sorry maybe bad translation Description: Apparently because of a system error, I have access to change information in the public program. This option is given only for external programs.But here is a public...

HackerOne: Discrepancy in hacker profile report count may reveal existence of a private program by publishing a report

Hi team , @pei, @jobert , @bencode Summary: Again We have publish report page https://hackerone.com/hacktivity/publish But we have bypass query 401476 this description The profile page counts the number of created your reports. But it does not consider the reports that are created in the sandbox...

Weblate: Tab nabbing via window.opener

Details: When you open a link in a new tab target="blank" , the page that opens in a new tab can access the initial tab and change it's location using the window.opener property. Attack scenario: here i have provided 2 videos, in video 1 i have my editorial link set. to show that tabnapping is...