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Web Apps

UNION-based SQL injection: dumping the user table from a product filter

A category filter concatenates the `category` query parameter straight into a SQL query. This write-up takes it from a single quote to the full credentials table with a UNION SELECT.

x00sec PHP + MySQL storefront (product category filter)
0.0180 BTC
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Web Apps

Stored XSS in a comment field escalating to one-click admin takeover

Comments are stored and re-rendered without encoding. A planted payload runs in every reader's browser — including the moderator's — and is chained to create a new admin account.

zero_day_phantom Blog comment system rendering author-controlled HTML
0.0330 BTC
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Web Apps

CSRF account-email takeover by exploiting broken token validation

The change-email form has an anti-CSRF token, but the server ignores the parameter if you delete it. That turns a protected form into a one-click account takeover.

cyber_ghost Change-email endpoint with a CSRF token that is only checked when present
0.0120 BTC
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Mobile (iOS/Android)

Android exported-activity hijack: bypassing login via an unprotected deep link

An internal "account settings" screen is marked exported for a deep-link feature, but never verifies it was actually reached through the login flow. Any app — or a single adb command — can jump straight to it.

hex_weaver Android app (API 24+) exporting a post-login Activity with no caller check
0.0200 BTC
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Mobile (iOS/Android)

Insecure Android WebView JavaScript bridge leaking the session token to any loaded page

The app adds a JS bridge exposing the session token to any page its WebView loads, and a deep link lets an attacker point that WebView at a page they control.

x00sec In-app browser WebView with a @JavascriptInterface bridge, reachable via a deep link
0.0240 BTC
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Kernel / LPE

Linux LPE via a TOCTOU race in a setuid helper's config-file check

A privileged helper checks that the invoking user can read a config file, then opens a *different* reference to that same path moments later. Racing a symlink swap between the two turns a read check into a root-owned write primitive.

zero_day_phantom setuid-root CLI helper that validates a config path with access() before opening it
0.0320 BTC
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Kernel / LPE

Local privilege escalation via a NOPASSWD sudo rule that trusts an unqualified PATH search

sudoers grants NOPASSWD execution of a backup script as root. The script calls `tar` and `gzip` by bare name instead of an absolute path — planting a malicious `tar` earlier in $PATH turns a routine job into a root shell.

cyber_ghost sudoers NOPASSWD rule allowing a maintenance script to run as root
0.0190 BTC
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Scripts & Tools

Subdomain takeover scanner: detecting dangling CNAME records pointing to abandoned cloud services

A recon tool that resolves a subdomain list, fingerprints their CNAME targets against known "unclaimed service" signatures (GitHub Pages, S3, Heroku, etc.), and flags the ones ripe for takeover.

hex_weaver An organization's subdomain inventory (external recon phase)
FREE
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Scripts & Tools

Password-spray throttling bypass tool exploiting a spoofable per-IP rate limiter

The app throttles failed logins per source IP, but reads that IP straight from an X-Forwarded-For header the client fully controls. Rotating a fresh fake value per request turns a 5-attempt lockout into unlimited attempts.

x00sec Login endpoint that rate-limits by client IP taken from X-Forwarded-For
0.0170 BTC
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