CVE-2026-57518Public exploitNetwork attack vector

Authenticated RCE via unchecked custom-role assignment

Published Jun 26, 2026 · Updated Jun 26, 2026

Missing authorization in Pagekit CMS 1.0.18 allows remote authenticated users to assign themselves arbitrary custom roles. UserApiController::saveAction() blocks only the built-in Administrator role, then saves all unchecked custom role identifiers supplied in the request. Reachability requires the user: manage users permission; a role granting system: manage packages enables malicious PHP package installation and code execution.

CVSS severity8.7
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Pagekit CMS 1.0.18 allows remote authenticated users to assign themselves arbitrary custom roles. UserApiController::saveAction() blocks only the built-in Administrator role, then saves all unchecked custom role identifiers supplied in the request. Reachability requires the user: manage users permission; a role granting system: manage packages enables malicious PHP package installation and code execution.

The record

CVE
CVE-2026-57518
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
YOOtheme
Product
Pagekit
Classifications
CWE-862, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.0.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

YOOtheme · Pagekitversion=0 <=1.0.18

Published CVSS scores

8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1098Account Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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