CVE-2026-31857

HIGH EPSS 47.1%
Published Mar 11, 20263mo ago · Modified Mar 17, 20263mo ago
8.1 CVSS 4.0
High
Find Similar
Published Mar 11, 2026 3mo ago
Last Modified Mar 17, 2026 3mo ago

Description

Craft is a content management system (CMS). Prior to 5.9.9 and 4.17.4, a Remote Code Execution vulnerability exists in the Craft CMS 5 conditions system. The BaseElementSelectConditionRule::getElementIds() method passes user-controlled string input through renderObjectTemplate() -- an unsandboxed Twig rendering function with escaping disabled. Any authenticated Control Panel user (including non-admin roles such as Author or Editor) can achieve full RCE by sending a crafted condition rule via standard element listing endpoints. This vulnerability requires no admin privileges, no special permissions beyond basic control panel access, and bypasses all production hardening settings (allowAdminChanges: false, devMode: false, enableTwigSandbox: true). Users should update to the patched 5.9.9 or 4.17.4 release to mitigate the issue.

CVSS Details

Base Score
8.1
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
47.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-94 Improper Control of Generation of Code (Code Injection) Injection

Affected Products 12

VendorProductVersionRange
craftcmscraft_cms*≥4.0.0.1  –  <4.17.4
craftcmscraft_cms*≥5.0.1  –  <5.9.9
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms4.0.0any
craftcmscraft_cms5.0.0any
craftcmscraft_cms5.0.0any

References 2

  • github.com https://github.com/craftcms/cms/commit/8d4903647dcfd31b8d40ed027e27082013347a80
    Patch
  • github.com https://github.com/craftcms/cms/security/advisories/GHSA-fp5j-j7j4-mcxc
    PatchVendor Advisory

Remediation

  • github.com https://github.com/craftcms/cms/commit/8d4903647dcfd31b8d40ed027e27082013347a80
    Patch
  • github.com https://github.com/craftcms/cms/security/advisories/GHSA-fp5j-j7j4-mcxc
    PatchVendor Advisory