CVE-2026-57518

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.

CVSS v4.0

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.69% chance of exploitation in the next 30 days, 50th percentile

Published

2026-06-26

Updated

2026-07-14

Proof-of-concept exploits (1)

• https://gist.github.com/sermikr0/6f0a67e9d101746fcdb04827de137847

References

• CVE Record
• NVD entry

Related

• CVE-2026-57517
• CVE-2026-57520
• CVE-2026-5741
• CVE-2026-57521
• CVE-2026-5724
• CVE-2026-57522