Vulnerability · Published Jun 26, 2026 · Assigned by VulnCheck

CVE-2026-57518Pagekit CMS 1.0.18 Privilege Escalation via UserApiController

High 8.8

In plain English

A high-severity missing authorization in pagekit from pagekit. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.7%top 47.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
pagekit	pagekit	0 – through 1.0.18

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Researcher Disclosure technical-description, exploit
https://www.vulncheck.com/advisories/pagekit-cms-privilege-escalation-via-userapicontroller third-party-advisory