What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-07-14
• Weakness: CWE-862

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

• pagekit: through 1.0.18

References

• https://gist.github.com/sermikr0/6f0a67e9d101746fcdb04827de137847
• https://www.vulncheck.com/advisories/pagekit-cms-privilege-escalation-via-userapicontroller

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