clavaque s2Member: remote code execution

s2Member

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…

Do this now

Check the vendor's advisory for a fix and restrict access to the s2Member plugin meanwhile.

Still cooking for s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions.

First seen: 2 Nov 2026
Last update: 2 Nov 2026, 23:18 UTC
Identifiers: CVE-2026-86596
CVSS: 9.8
Source: news
On the menu as: WordPress

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## clavaque s2Member: remote code execution
Severity: critical. Patch status: fix status unknown.
Affected: s2Member
Ids: CVE-2026-86596

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…

## Steps
1. Search the repo, its CI and infra config for s2Member. If present, report the version in use and whether it's affected.
2. s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions <= 260927: the CVE record names no fix; check the vendor advisory before assuming there is none. Until one ships: restrict network access to it.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions <= 260927 | not named in the CVE record | check the vendor advisory: https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-subscr-or-wa-w-level.inc.php#L514 | restrict network access to it |

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-86596") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2026-86596 https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-subscr-or-wa-w-level.inc.php#L514
https://pwned.coffee/i/the-s2member-plugin-for-wordpress-is-vulnerable-to-remot-cve-2026-86596

Receipt

Exploitation: No known exploitation
Checked by hand “The CVE record names a WordPress plugin.” source
Fix by release line: Product Affected Fixed in Source
s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions <= 260927 fix not named in the CVE record: see vendor advisory CVE record (CNA) checked 4 Nov
The CVE record names no fix for one line; the vendor’s advisory may: plugins.trac.wordpress.org
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (CNA Wordfence) for CVE-2026-86596
Last checked: 4 Nov 2026, 08:18 UTC

Product	Affected	Fixed in	Source
s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions	<= 260927	fix not named in the CVE record: see vendor advisory	CVE record (CNA) checked 4 Nov

Sources: KEV – CVE record ✓ Vendor ✓

Sources

Totalone very hot coffee