Privilege Escalation in Smart Popup by Supsystic (WordPress plugin) (CVE-2026-18322)
Summary
Vulnerability in Smart Popup by Supsystic (WordPress plugin) (CVE-2026-18322). Successful exploitation can lead to full system takeover. Exploitable via save.
Original description
The description as published by the source.
The Smart Popup by Supsystic plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 1.12.0. This is due to a permission map collision in the havePermissions() function in classes/frame.php, where array_merge() overwrites the popup module's administrator-restricted method list with the base controller's value, silently removing save from protected actions; this is compounded by the subscription confirmation email embedding the same generic pps_nonce that the unauthenticated wp_ajax_nopriv_save endpoint accepts, and by the complete absence of any server-side role allowlist in createWpSubscriber(). This makes it possible for unauthenticated attackers to submit a crafted POST request to admin-ajax.php using a nonce obtained from a public subscription confirmation email, setting params[tpl][sub_wp_create_user_role] to administrator via the exposed popupControllerPps::save() action, and then triggering the stored confirmation flow to create a persistent WordPress Administrator account with attacker-chosen credentials.
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-2026-18322 has been found in Smart Popup by Supsystic (WordPress plugin).
Attackers can target a specific entry point like save 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 "Smart Popup by Supsystic (WordPress plugin) CVE-2026-18322" on the vendor's site.
CVE-2026-18322 (Smart Popup by Supsystic (WordPress plugin)) — CWE-269 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Attack surface: save / pps_nonce / wp_ajax_nopriv_save / administrator
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 Smart Popup by Supsystic (WordPress plugin). Attackers reach the vulnerable code path via save.
Check the vendor advisory for the affected versions of Smart Popup by Supsystic (WordPress plugin). Attack surface: save / pps_nonce / wp_ajax_nopriv_save / administrator.
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 Smart Popup by Supsystic (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 security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web security@wordfence.com
- web github.com