EUVD-2026-62549Severity by source
CVSS: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
PR:L reflects the mandatory page-editor account; UI:N because the attacker can self-trigger the page render; S:U as code executes within the web server process without crossing a security boundary.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
Grav is a file-based Web platform. Prior to 2.0.7, Grav Blueprint::dynamicData() in system/src/Grav/Common/Data/Blueprint.php sends an editor-controlled Class::method provider and arguments to call_user_func_array() without rejecting dangerous callback parameters. An account with admin.pages or api.pages.write can use Grav\Common\Utils::arrayFilterRecursive() as a trampoline with system as the callback, place a command in page frontmatter, and execute that command as the web server user when the page is viewed. This issue is fixed in version 2.0.7.
AnalysisAI
Remote code execution in Grav CMS prior to 2.0.7 allows low-privileged page editors to execute arbitrary OS commands as the web server user via a callable-injection flaw in Blueprint::dynamicData(). An account holding admin.pages or api.pages.write permission can embed a malicious data-options@ blueprint directive in page frontmatter that chains through Utils::arrayFilterRecursive() as a trampoline into PHP's system() function, executing the command when the page is rendered. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Grav CMS account holding either the admin.pages or api.pages.write permission - these are the specific permission strings that gate access to page frontmatter editing. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) accurately captures the threat profile: network-reachable, low exploitation complexity, requiring only a low-privilege page-editor account, with full confidentiality, integrity, and availability impact on the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Grav CMS to version 2.0.7 or later, available at https://github.com/getgrav/grav/releases/tag/2.0.7; this is the vendor-confirmed fix and closes the vulnerability by adding callable-safety guards in Blueprint.php. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: audit all Grav CMS installations to identify versions < 2.0.7 and enumerate all accounts holding admin.pages or api.pages.write permissions. …
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External POC / Exploit Code
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