Reddit: One-click account hijack for anyone using Apple sign-in with Reddit, due to response-type switch + leaking href to XSS on www.redditmedia.com

Hi, Description I've been researching new ways to steal OAuth codes and access-tokens using postMessage, and I found a way for me to steal the code and/or access-token from Apple-sign-in on reddit.com allowing a full account hijack of the account in Reddit. The way it works is this: 1. Attacker...

Reddit: Able to bypass email verification and change email to any other user email

The reporter discovered they were able to hijack invites to other ads teams by adding the extra field, email, to a request that would allow them to bypass email verification. By doing so they were able to accept invites to ads teams on behalf of others and assume the role of the invitee with thei...

Reddit: Moderators can send messages to users from banned subreddits via `oauth.reddit.com/api/mod/conversations`

Summary: It is possible for moderators to send messages to users from a banned subreddit. I assume this is not intended considering that when trying to send a message as a banned subreddit via reddit.com/message/compose from field you get a 200 response but the message is never delivered to the...

Reddit: Able to approve admin approval and change effective status without adding payment details .

Summary: In https://ads.reddit.com/ you can create campaign under which you can create ads , once you create new campaign , it is on pending stage and will not be delivered unless you add payment details and is reviewed by admin and approved according to what it says here...

Socid-Extractor - Extract Accounts Info From Personal Pages On Various Sites For OSINT Purpose

Extract information about a user from profile webpages / API responses and save it in machine-readable format. Usage As a command-line tool: $ socidextractor --url https://www.deviantart.com/muse1908 country: France createdat: 2005-06-16 18:17:41 gender: female username: Muse1908 website:...

‘Cities: Skylines’ Gaming Modder Banned Over Hidden Malware

The developer of several popular mods for the Cities: Skylines city-building game has been banned after malware was discovered hidden in their wares. The modder, who goes by the handle Chaos as well as Holy Water, reportedly tucked an automatic updater into several mods that enabled the author to...

Reddit: CSRF (protection bypassed) to force a below 18 user into viewing an nsfw subreddit !

Summary of the Issue A state-changing POST request to https://old.reddit.com/over18? lacked proper modhash validator leaving the sensitive action vulnerable to CSRF attacks. An attacker can trick users into executing the action, enabling/disabling "I am over eighteen years old" and willing to vie...

Reddit: Broken links make users from France unable to understand the allowed content policy

Vulnerability description not provided...

The 2021 Naughty and Nice Lists: Cybersecurity Edition

Editor’s note: We had planned to publish our Hacky Holidays blog series throughout December 2021 – but then Log4Shell happened, and we dropped everything to focus on this major vulnerability that impacted the entire cybersecurity community worldwide. Now that it’s 2022, we’re feeling in need of...

Researchers Have a Method to Spot Reddit’s State-Backed Trolls

Academics claim they can sniff out the telltale signs of troll-like behavior. But is it really as simple as monitoring cute animal postings?...

Snudown Encryption Problem Vulnerability

Snudown is an open source package. It is a reddit-specific branch of the Sundown Markdown parser used by GitHub, with added Python integration. Snudown has a cryptographic problem vulnerability that can be exploited by attackers to conduct DoS attacks...

CVE-2021-41168

Snudown is a reddit-specific fork of the Sundown Markdown parser used by GitHub, with Python integration added. In affected versions snudown was found to be vulnerable to denial of service attacks to its reference table implementation. References written in markdown referencename:...

Snudown 加密问题漏洞

Snudown is an open source package. It is a reddit-specific branch of the Sundown Markdown parser used by GitHub, with added Python integration. Snudown has a cryptographic problem vulnerability that can be exploited by attackers to conduct DoS attacks...

Reddit: Hash-Collision Denial-of-Service Vulnerability in Markdown Parser

Summary: We have found three bugs in Reddit's markdown parser. Two of these bugs are exploitable to launch an algorithmic complexity denial-of-service DoS attack. In this report we explain the bugs and exploits. We also show, in a non-disruptive way, that it appears to exist in the current versio...

Reddit: com.reddit.frontpage vulernable to Task Hijacking (aka StrandHogg Attack)

Summary: The app com.reddit.frontpage is vulnerable to Task Hijacking used by widespread Android trojans. Task hijacking allows malicious apps to inherit permissions of vulnerable apps and is usually used for phishing login credentials of victims. Impact: Assuming a malicious actor want's to grab...

Reddit: Outsider can affect Upvote Percentage of private subreddit post by calling /api/vote API

Summary: Attacker that does not have access to a private subreddit, can still affect Upvote Percentage of any posts in this private subreddit. He does that by calling /api/vote API and passing post id directly. What is Upvote Percentage?: F1407175 Impact: - Attacker can affect Upvote Percentage o...

Reddit: Open Redirect on www.redditinc.com via `failed` query param

hello dear support I have found the issue on https://www.redditinc.com/ama HTTP request POST /ama HTTP/1.1 Content-Type: multipart/form-data; boundary=----------YWJkMTQzNDcw Cookie:...

Reddit: Domain Takeover of Reddit.ru via DNS Hijacking

Summary I discovered that Reddit.ru was vulnerable to DNS hijacking via DNS provider, Reg.ru. This would allow a malicious attacker to control the content on this domain, as well as, create email addresses associated with it... I'm going to be totally honest and say that any of us ethical hackers...

Reddit: Oauth Misconfiguration Lead To Account Takeover

Summary: OAuth is a commonly used authorization framework that enables websites and web applications to request limited access to a user's account on another application. Crucially, OAuth allows the user to grant this access without exposing their login credentials to the requesting application...

Reddit: No rate limit leads to spaming post

Vulnerability description not provided...