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Grav API Plugin EUVDEUVD-2026-58637

| CVE-2026-72823 MEDIUM
Missing Authorization (CWE-862)
2026-08-14 VulnCheck GHSA-mfhq-ghcj-c36q
Authentication Bypass Grav
5.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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
vuln.today AI
4.2 MEDIUM

Non-default demo mode with writable resources is a condition outside attacker control, warranting AC:H; PR:L reflects required super-account API key; no confidentiality impact applies.

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

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Patch available
Aug 14, 2026 - 13:01 EUVD
Analysis Generated
Aug 14, 2026 - 12:37 vuln.today

DescriptionCVE.org

The Grav API plugin (getgrav/grav-plugin-api) before 1.0.13 contains an API-key scope cap bypass in DemoController. Its private requireSuper() method checks isSuperAdmin() and returns early before invoking requirePermission(), so the api_key_scopes cap (enforced only in requirePermission()) is skipped. As a result, any scoped API key minted on a super account can bypass its scope restrictions when calling the baseline() and reset() operations (e.g. POST /api/v1/demo/reset), allowing it to capture the demo baseline or force a demo reset. Impact is bounded to demo-engine control and is conditional on demo mode being configured with writable resources.

AnalysisAI

Scope cap bypass in the Grav API plugin before 1.0.13 allows a holder of a scoped API key issued on a super admin account to call unauthorized DemoController operations. The private requireSuper() method exits early after confirming isSuperAdmin(), never reaching requirePermission() where api_key_scopes enforcement occurs, making the scope restriction on that key inert for the baseline() and reset() endpoints. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Two simultaneous non-default conditions must be satisfied. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 score of 5.3 (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N) reflects network-accessible exploitation with low-privilege authentication and limited impact. … 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 the Grav API plugin to version 1.0.13 or later, which corrects the authorization logic in requireSuper() so that requirePermission() is invoked before returning, restoring api_key_scopes enforcement for all callers. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-58637 vulnerability details – vuln.today
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