CVE-2026-86596

Description

The s2Member plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, <= 260927 via the 'item_name' parameter parameter. This is due to insufficient sanitization in strip_php_tags_deep(), which only strips literal '<?' sequences, combined with a post-interpolation placeholder cleanup that reassembles a valid '<?php' opener after the attacker-controlled value has already been embedded in the email template. This makes it possible for authenticated attackers, with custom-level access and above, to execute code on the server.

Overview

State: PUBLISHED
Assigner (CNA): Wordfence
CVSS severity: CRITICAL
CVSS score: 9.8 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score: 9.8 / 10 CRITICAL source: CNA overview
CWE(s): CWE-94
Reserved: 2026-09-08
Published: 2026-11-02 21:30 UTC
Last updated: 2026-11-02 21:30 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/86xxx/CVE-2026-86596.json
Linked Threat: CVE-2026-86596 — s2Member <= 260927 - Unauthenticated Remote Code Execution via 'item_name' IPN Parameter

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-115642

EUVD enrichment is queued; refresh the page in a few seconds.

Affected products (1)

Vendor	Product	Versions	Platforms
clavaque	s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions	`0` (affected)	—

Vendor references (9)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

Indicators (1)

IOCs linked to the auto-promoted Threat row.

Type	Value	VirusTotal	Attached
cve	`CVE-2026-86596`	no local data	2026-11-02 11:28 UTC

Remediations (9)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

September 2026 Critical Security Patch Update Released

web:blogs.oracle.com

For more information about the Critical Security Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-11-02 11:28 UTC
CVE Vulnerabilities 2026: Critical Flaws & Fixes Hub

web:cyberupdates365.com

Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.

2026-11-02 11:28 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-11-02 11:28 UTC
[Security Advisory] September 2026 CVE Advisory Notification

web:support.servicenow.com

What you need to know: On September 24, 2026 , ServiceNow issued CVE - 2026 -86857, CVE - 2026 -86858, CVE - 2026 -13016, CVE - 2026 -86859, and CVE - 2026 -86860. Each of these security issues was identified through internal security testing, customer security assessments, or reports submitted through ServiceNow's responsible disclosure and bug bounty programs and was remediated independently. For security ...

2026-11-02 11:28 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

None of these is a clean fix , which is why the decision on how to remediate depends on knowing what package versions are running in production and why. This post will cover how AI has accelerated CVE detection and discovery, the upgrade trap, what CVE remediation actually involves in 2026 , and how to solve the CVE remediation problem.

2026-11-02 11:28 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

web:www.openhands.dev

Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

2026-11-02 11:28 UTC
Oracle Critical Security Patch Update Advisory - June 2026

web:www.oracle.com

Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

2026-11-02 11:28 UTC
Oracle Critical Security Patch Update Advisory - September 2026

web:www.oracle.com

Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.

2026-11-02 11:28 UTC
Wordfence remediation: s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions

Wordfence

Update to version 261001, or a newer patched version

2026-11-02 11:28 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-86596.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "s2Member \u2013 Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions",
          "vendor": "clavaque",
          "versions": [
            {
              "lessThanOrEqual": "260927",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "khanhnv"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The s2Member plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, <= 260927 via the 'item_name' parameter parameter. This is due to insufficient sanitization in strip_php_tags_deep(), which only strips literal '<?' sequences, combined with a post-interpolation placeholder cleanup that reassembles a valid '<?php' opener after the attacker-controlled value has already been embedded in the email template. This makes it possible for authenticated attackers, with custom-level access and above, to execute code on the server."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94 Improper Control of Generation of Code",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T21:30:23.199Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/bbe64cd3-c5ca-4867-90de-4784510a1126?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/utilities.inc.php#L49"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L138"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L131"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L104"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/utils-strings.inc.php#L201"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in.inc.php#L49"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-subscr-or-wa-w-level.inc.php#L514"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3722434/s2member"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-14T04:20:37.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-11-02T08:59:41.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "s2Member <= 260927 - Unauthenticated Remote Code Execution via 'item_name' IPN Parameter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-86596",
    "datePublished": "2026-11-02T21:30:23.199Z",
    "dateReserved": "2026-09-08T08:18:31.098Z",
    "dateUpdated": "2026-11-02T21:30:23.199Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}