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gitroomhq released Postiz App v2.21.8 with fixes for three security vulnerabilities tracked as PSA-2026-2CAQ96, PSA-2026-WWFR8X, and PSA-2026-Q3TCPK, and urged all users to upgrade immediately. The release was published by egelhaus and bundled the security patches with additional bug fixes, UI changes, and feature updates after 41 commits were merged into main since v2.21.7.
One of the addressed issues, PSA-2026-Q3TCPK, was disclosed as an unauthenticated arbitrary lifetime PRO grant via NowPayments webhook, indicating that an attacker could abuse the payment webhook flow to assign PRO access without authentication. Alongside the security remediation, the release added contributor forms, media type detection helpers, notification list updates, and post creation method tracking, with bsantosh909 and egelhaus listed as contributors.
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2 events from the most recent confirmed update back to the earliest known activity.
A GAdvisory entry was published for PSA-2026-Q3TCPK, describing the issue as an unauthenticated arbitrary lifetime PRO grant via the Nowpayments webhook. This added public technical identification for one of the vulnerabilities fixed in Postiz v2.21.8.
The gitroomhq/postiz-app project released version v2.21.8 and stated that it fixes three security issues: PSA-2026-2CAQ96, PSA-2026-WWFR8X, and PSA-2026-Q3TCPK. The release notes urged all users to upgrade immediately.
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Postiz, an AI social media scheduling tool, patched two **server-side request forgery** vulnerabilities affecting its public stream functionality. `CVE-2026-34577` exposed an unauthenticated flaw in `GET /public/stream`, where a user-controlled `url` parameter could cause the server to fetch and return the full HTTP response to the requester. The endpoint relied on an extension check requiring the URL to end in `mp4`, but that validation could be trivially bypassed, enabling access to internal services, cloud metadata endpoints, and other internal network resources. The issue was fixed in version **2.21.3** and assigned **CWE-918**.
Jun 29, 2026
Paymenter released **v1.2.11** to patch a critical remote code execution flaw tracked as **CVE-2025-58048** and **GHSA-5pm9-r2m8-rcmj**. The vulnerability affects `paymenter/paymenter` versions earlier than `1.2.11` and stems from the ticket attachments feature, where a malicious authenticated user could upload arbitrary files and trigger code execution on the server. The issue was assigned a **CVSS v3.1 score of 9.9**, reflecting the risk that even a low-privilege account could compromise the application environment. Successful exploitation could allow attackers to execute arbitrary code, extract database contents, read sensitive files such as `.env`, and run system commands in the web server context. Paymenter said the flaw was fixed in commit `87c3db4` and shipped in release commit `79b2a5d` as part of **v1.2.11**. While temporary mitigations include forcing downloads from `/storage/` through nginx or blocking direct access to `/storage/` with a WAF such as Cloudflare, the project states that upgrading to **v1.2.11 or later** is the only complete remediation.
Jul 12, 2026
A critical vulnerability in **Postiz** allows any authenticated user to escalate privileges to **SUPERADMIN** by forging JWTs through the application's **Skool integration callback**. Tracked as **`CVE-2026-48781`** and **`GHSA-j77w-h625-56q2`**, the flaw stems from attacker-controlled JSON being signed into a session-like token with the application's `JWT_SECRET`, while authentication logic trusted the token's claims without reloading the user record from the database. The bug affects Postiz versions prior to **`2.21.8`** and enables cross-tenant takeover, arbitrary organization impersonation, full access across the affected instance, exposure of all registered users, and the ability to post through victims' connected social media accounts. The issue is rated **CVSS 9.9 (Critical)**, was verified and patched by the vendor, and defenders are advised to upgrade to **`2.21.8`**, rotate JWT secrets if compromise is suspected, and review logs for impersonation or unauthorized access activity.
Jul 12, 2026