CVE-2026-57518 Pagekit CMS 1.0.18 Privilege Escalation via UserApiController
Authenticated users can escalate privileges to install malicious packages, leading to remote code execution in Pagekit CMS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57518?
CVE-2026-57518 is a high-severity vulnerability in pagekit, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Pagekit CMS 1.0.18 contains a privilege escalation vulnerability that allows authenticated users with the 'user: manage users' permission to escalate privileges by assigning arbitrary custom roles to themselves due to missing authorization checks in UserApiController::saveAction(). Attackers can assign themselves a custom role with the 'system: manage packages' permission and then upload and install a malicious PHP package through the admin package installer to achieve remote code execution.
Weakness: CWE-862
Which versions are affected by CVE-2026-57518?
How do I fix CVE-2026-57518?
No fix has been published for CVE-2026-57518 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-57518 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57518 exists.
Sources
Also known as GHSA-rc6m-346q-rgq6.