Vulnerability · Published Oct 24, 2026 · Assigned by postiz
CVE-2026-115932Path traversal in post media lets any registered user read server files
Critical 9.6
In plain English
A critical-severity path traversal in postiz-app from GitroomHQ. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Official description
When a post is published, Postiz treats a media path that is not a web address as a file on the server's disk, but it does not check that the file lies inside the upload directory. A registered user can store a crafted media path with a post, get it past the checks that normally restrict it, and have the publishing worker read an arbitrary file and send it as an attachment to a Discord server the user controls. The same unconfined reads can be reached through two further routes. One tells the caller whether a file exists and can exhaust the backend's memory, the other delivers the file the same way as the main route. Self-registration is open by default, so the attacker needs no existing account.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GitroomHQ | postiz-app | 2.23.0 – before 2.25.3 |
Weakness: CWE-22, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N