Privilege Escalation in Grav API plugin (CVE-2026-72833)
Summary
Vulnerability in Grav API plugin (CVE-2026-72833). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.0.13 or later.
Original description
The description as published by the source.
The Grav API plugin (getgrav/grav-plugin-api) versions >= 1.0.6 and <= 1.0.11 contain a privilege escalation vulnerability. A scoped API key minted on a super-admin account bypasses its declared scope cap on four isSuperAdmin()-gated write endpoints (in GroupsController, AccountsConfigController, PreferencesController, and DashboardWidgetController). These endpoints authorize via a super-admin early-return that never invokes requirePermission()—the sole enforcement point of the scope cap—so a 'read-only'-scoped key (e.g. api.pages.read) can perform super-only write operations, including rewriting group ACL maps to grant super-admin privileges to arbitrary accounts. A leaked or delegated read-only CI/monitoring key can therefore gain full super-admin write capability. Fixed in 1.0.13.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-72833 has been found in Grav API plugin.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: upgrade Grav API plugin to 1.0.13 or later.
If unsure, ask your IT team or search "Grav API plugin CVE-2026-72833" on the vendor's site.
CVE-2026-72833 (Grav API plugin) — CWE-269 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Patched: 1.0.13 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-269) exists in Grav API plugin.
Check the vendor advisory for the affected versions of Grav API plugin.
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.
Update to 1.0.13.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Grav API plugin を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade Grav API plugin to 1.0.13ステージング環境で 1.0.13 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web disclosure@vulncheck.com
- web nvd.nist.gov
- web disclosure@vulncheck.com
- web github.com