CVE-2026-19264

CVE-2026-19264 - Unauthenticated Path Traversal to Full Instance Takeover in Postiz Author: Krithik Babu P @DarkLycn1976 Published: 2026-08-10 CVE: CVE-2026-19264 Severity: Critical - CVSS 4.0 9.3 / CVSS 3.1 9.8 CWE: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory Affected:...

CVE-2026-40487

CVE-2026-40487 - Postiz = 2.21.5 - Arbitrary File Upload via MIME-Type Spoofing to Stored XSS to Account Takeover Discovered & reported by: Astaruf Full writeup: https://nstsec.com/en/posts/postiz-xss-cve-2026-40487/ NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-40487 GHSA entry:...

gha-lab-677752506e

Automated research artifact — not the upstream project. This repository is a disposable lab built by an automated harness for a master's thesis at Université Laval on reproducing published GitHub Actions workflow vulnerabilities. It is a verbatim snapshot of gitroomhq/postiz-app at commit...

CVE-2026-48799

Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary...

CVE-2026-48799 Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook

Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary...

CVE-2026-48799

Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary...

CVE-2026-48799

CVE-2026-48799 - Postiz : An unauthenticated Nowpayments IPN callback verification flaw allows a low-privilege attacker to read the target subscription ID from the untrusted request body and grant lifetime PRO subscriptions to arbitrary organizations. Root cause: missing IPN authenticity verifica...

CVE-2026-48799 Postiz: Unauthenticated arbitrary lifetime PRO grant via Nowpayments webhook

Postiz is an AI social media scheduling tool. Prior to 2.21.8, Postiz fails to verify Nowpayments IPN callback authenticity against the payment provider shared secret and reads the target subscription identifier from the untrusted request body, allowing a low-privileged account to grant arbitrary...

CVE-2026-48781

Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON blob into a session-shape JWT using the application's JWTSECRET, and the auth middleware trusted every claim in that JWT without re-resolving the user from...

CVE-2026-48781

Summary (CVE-2026-48781): Postiz (AI social media scheduler) versions before 2.21.8 are affected. The Skool integration callback could sign an attacker-controlled JSON blob into a session-shape JWT using the app’s JWT_SECRET, and the authentication middleware trusted every claim without re-resolv...

CVE-2026-48781 Postiz has cross-tenant SUPERADMIN takeover via Skool-provider JWT forgery

Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON blob into a session-shape JWT using the application's JWTSECRET, and the auth middleware trusted every claim in that JWT without re-resolving the user from...

CVE-2026-48781 Postiz has cross-tenant SUPERADMIN takeover via Skool-provider JWT forgery

Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON blob into a session-shape JWT using the application's JWTSECRET, and the auth middleware trusted every claim in that JWT without re-resolving the user from...

PT-2026-50121

Postiz is an AI social media scheduling tool. In versions prior to 2.21.8, the Skool integration callback signed an attacker-controlled JSON blob into a session-shape JWT using the application's JWT SECRET, and the auth middleware trusted every claim in that JWT without re-resolving the user from...

CVE-2026-42346

Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU Time-of-Check-Time-of-Use vulnerability: isSafePublicHttpsUrl resolves DNS to validate the target IP, but subsequent fetch calls...

CVE-2026-42298

Postiz is an AI social media scheduling tool. Prior to commit da44801, a "Pwn Request" vulnerability in the Build and Publish PR Docker Image workflow .github/workflows/pr-docker-build.yml allows any unauthenticated user to execute arbitrary code during the Docker build process and exfiltrate a...

CVE-2026-42556 Postiz stored XSS in public preview page

Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/?share=true to another user. The preview page...

CVE-2026-42556

Postiz (AI social media tool) is affected from v2.21.6 up to, but not including, v2.21.7. An authenticated user who can create posts can tamper their own save request to store arbitrary HTML in post content. When a user visits the public preview link /p/?share=true, the preview renders the stored...

CVE-2026-42556 Postiz stored XSS in public preview page

Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/?share=true to another user. The preview page...

CVE-2026-42556 Postiz stored XSS in public preview page

Postiz is an AI social media scheduling tool. From version 2.21.6 to before version 2.21.7, any authenticated user who can create a post can store arbitrary HTML in post content by tampering their own save request and send the public preview link /p/?share=true to another user. The preview page...

CVE-2026-42346

Postiz is an AI social media scheduling tool. From version 2.16.6 to before version 2.21.7, all SSRF protections added in v2.21.4–v2.21.6 share a fundamental TOCTOU Time-of-Check-Time-of-Use vulnerability: isSafePublicHttpsUrl resolves DNS to validate the target IP, but subsequent fetch calls...