Privilege Escalation in WP Grid Builder (WordPress plugin) (CVE-2026-13756)
Summary
Vulnerability in WP Grid Builder (WordPress plugin) (CVE-2026-13756). Successful exploitation can lead to full system takeover. Exploitable via wp_capabilities.
Original description
The description as published by the source.
The WP Grid Builder plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.3.3. This is due to missing authorization and meta key validation in the update() handler for the /wp-json/wpgb/v2/metadata REST endpoint. This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to Administrator by updating their own wp_capabilities user meta with a crafted nested array payload.
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-2026-13756 has been found in WP Grid Builder (WordPress plugin).
Attackers can target a specific entry point like wp_capabilities over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "WP Grid Builder (WordPress plugin) CVE-2026-13756" on the vendor's site.
CVE-2026-13756 (WP Grid Builder (WordPress plugin)) — CWE-269 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Attack surface: wp_capabilities
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 WP Grid Builder (WordPress plugin). Attackers reach the vulnerable code path via wp_capabilities.
Check the vendor advisory for the affected versions of WP Grid Builder (WordPress plugin). Attack surface: wp_capabilities.
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
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 WP Grid Builder (WordPress 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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2Post-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 nvd.nist.gov
- web docs.wpgridbuilder.com
- web security@wordfence.com
- web github.com
- web security@wordfence.com