Privilege Escalation in Pagekit CMS by Pagekit
CVE-2026-57518

8.7HIGH

Key Information:

Vendor

Pagekit

Status
Pagekit
Vendor
CVE Published:
26 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-57518?

Pagekit CMS 1.0.18 is affected by a vulnerability that enables authenticated users with the 'user: manage users' permission to elevate their privileges. This occurs due to inadequate authorization checks within the UserApiController::saveAction() function. An attacker can exploit this flaw to assign themselves a custom role with enhanced permissions, such as 'system: manage packages', allowing them to upload and install malicious PHP packages via the admin package installer, which may lead to unauthorized remote code execution.

Affected Version(s)

pagekit 0 <= 1.0.18

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-57518 - Proof of Concept

References

https://gist.github.com/sermikr0/6f0a67e9d101746fcdb04827...
technical-descriptionexploit
https://www.vulncheck.com/advisories/pagekit-cms-privileg...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Saidakbarxon Maqsudxonov
.