CVE-2026-48783 Postiz has an unauthenticated billing-enforcement bypass via /public/modify-subscription
Unauthenticated users can bypass billing enforcement to disable integrations and reset schedules within their own organization.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-48783?
CVE-2026-48783 is a medium-severity missing authorization vulnerability in gitroomhq postiz-app, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-48783?
How do I fix CVE-2026-48783?
No fix has been published for CVE-2026-48783 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-48783 being exploited?
There is no known exploitation of CVE-2026-48783 in the wild and no public exploit code.
Sources
Also known as GHSA-v4wr-4j8g-4hfj.