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CVE-2026-86731— Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController

Quick assessment

Affected
craftcms cms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Craft CMS是Craft CMS公司的一套内容管理系统(CMS)。 Craft CMS 5.0.0-RC1版本至5.10.11版本存在授权问题漏洞，该漏洞源于UsersController::actionActivateUser缺少管理员目标保护，当目标用户为管理员时未调用requireAdmin()，导致具有administrateUsers权限的非管理员已认证控制面板用户能够激活待处理或故意停用的管理员账户，可能导致权限提升。

CVSS 6.5 · Medium EPSS 0.18% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
craftcms cms 5.0.0-RC1< 5.10.12 affected
5.10.12 unaffected
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I. Basic Information for CVE-2026-86731

Vulnerability Information
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Vulnerability Title
Craft CMS 5.0.0-RC1 before 5.10.12 Permission Escalation via UsersController
Source: CVE Program / CVE List V5
Vulnerability Description
Craft CMS versions 5.0.0-RC1 through 5.10.11 are missing an admin-target guard in UsersController::actionActivateUser (the users/activate-user action). While the action requires the administrateUsers permission, it does not call requireAdmin() when the targeted user is an administrator, unlike the mirror action actionDeactivateUser. As a result, an authenticated control panel user who is not an administrator but holds the administrateUsers permission can activate a pending or deliberately deactivated administrator account, which can lead to permission escalation when combined with resetting that account's password. The issue is fixed in Craft CMS 5.10.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Craft CMS 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Craft CMS是Craft CMS公司的一套内容管理系统(CMS)。 Craft CMS 5.0.0-RC1版本至5.10.11版本存在授权问题漏洞，该漏洞源于UsersController::actionActivateUser缺少管理员目标保护，当目标用户为管理员时未调用requireAdmin()，导致具有administrateUsers权限的非管理员已认证控制面板用户能够激活待处理或故意停用的管理员账户，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
craftcms cms 5.0.0-RC1 ~ 5.10.12 -

II. Public POCs for CVE-2026-86731

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III. Intelligence Information for CVE-2026-86731

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Vendor Advisories for CVE-2026-86731 (2)

Same Patch Batch · craftcms · 2026-09-08 · 3 CVEs total

CVE-2026-86730 8.8 HIGH Craft CMS 5.0.0-RC1 before 5.10.12 Behavior Injection RCE
CVE-2026-86732 8.8 HIGH Craft CMS before 5.10.12 Remote Code Execution via element-index

IV. Related Vulnerabilities

Same product: cms
Same vendor: craftcms
Same weakness: CWE-862

V. Comments for CVE-2026-86731

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