Insufficient ownership checks in `clientarea.php` allow an authenticated client area user to...
Summary
Vulnerability reported (CVE-2026-29204). Confidential information can be exposed externally. Exploitable via clientarea.php.
Original description
The description as published by the source.
Insufficient ownership checks in clientarea.php allow an authenticated client area user to submit requests using another user’s addonId without any ownership validation leading to unauthorized access to the victim's resources and their cPanel account.
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-2026-29204 has been found.
Attackers can target a specific entry point like clientarea.php over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 9.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "CVE-2026-29204" on the vendor's site.
CVE-2026-29204 — CWE-639 / CVSS v3 9.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: clientarea.php / addonId
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-639) has been reported. Attackers reach the vulnerable code path via clientarea.php without authentication.
Check the vendor advisory for the affected versions. Attack surface: clientarea.php / addonId.
Severity: Critical (CVSS 9.1/10). Confidential information can be exposed externally.
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影響コンポーネントを特定する。
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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 help.whmcs.com
- web github.com
- web support@hackerone.com