CVE-2026-48783

Postiz is an AI social media scheduling tool. Versions prior to 2.21.8 contained an unauthenticated endpoint that accepted a signed token and applied subscription-enforcement side effects to the organization referenced in that token's claims, without verifying the token's intended purpose. The endpoint, /public/modify-subscription, could not change the persisted subscription tier, but it did execute enforcement-related side effects on the caller's own organization, including adjusting team-member enablement state, disabling integrations exceeding the asserted plan's limits, and resetting the scheduled-post cron when the asserted plan was the free tier. Impact is limited to the attacker's own organization and cannot be redirected at other tenants through this endpoint. This issue has been fixed in version 2.21.8.

• CWE-345
• CWE-639
• CWE-749
• CWE-862

• https://gadvisory.org/advisories/PSA-2026-WWFR8X
• https://github.com/gitroomhq/postiz-app/commit/23696d2973510ae1f3f48bfa41a6bfbbf9827b05
• https://github.com/gitroomhq/postiz-app/releases/tag/v2.21.8
• https://github.com/gitroomhq/postiz-app/security/advisories/GHSA-v4wr-4j8g-4hfj

Published

Jun 17, 2026

Last Modified

Jun 17, 2026

Status

Deferred

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-48778Notepad++ is a free and open-source source code editor. Prio…7.8
• CVE-2026-48779ws is an open source WebSocket client and server for Node.js…7.5
• CVE-2026-4878A flaw was found in libcap. A local unprivileged user can ex…7
• CVE-2026-48780Forem is open source software for building communities. Prio…8.2
• CVE-2026-48781Postiz is an AI social media scheduling tool. In versions pr…9.9
• CVE-2026-48782Pydantic AI is a Python agent framework for building applica…6.8
• CVE-2026-48784Symfony is a PHP framework for web and console applications …6.1
• CVE-2026-48787gin-vue-admin is an AI-assisted basic development platform. …7.4
• CVE-2026-48788Remark42 is a self-hosted comment engine for blogs, articles…8.2
• CVE-2026-48789AnythingLLM is an application that turns pieces of content i…4.3
• CVE-2026-48790Turso CLI is the command line interface (CLI) to the open-so…5.5
• CVE-2026-48792pam_usb provides hardware authentication for Linux using ord…4.4