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Vulnerabilities

Vulnerability · 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.

Published Nov 2, 2026 · catalog updated Nov 2, 2026 · CLavaque s2Member

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Patch now

CVE-2026-86596 is in the CISA known-exploited catalog. Confirm CLavaque s2Member against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.

Same product and reporting

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
1.49%
Remediation
Remediation guidance
Affected products
vendor CLavaque s2Member · vendor clavaque · vendor clavaque 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 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor CLavaque s2Memberversion unspecified
  • vendor clavaqueversion unspecified
  • vendor clavaque s2memberversion unspecified

How to fix CVE-2026-86596

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-86596 is in the CISA known-exploited catalog. Confirm CLavaque s2Member against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 1.49%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 2, 2026 · VulnCheck KEV

    Detected

    CVE-2026-86596 is listed in VulnCheck KEV.

  2. Nov 2, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  3. Nov 2, 2026 · EUVD

    Updated

    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 valu

Sources

  • CVE.orgVulnerability recordCVE-2026-86596

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-86596

    30-day exploitation probability 1.49%

    first.org
  • EUVDVulnerability recordEUVD-2026-115642

    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

    euvd.enisa.europa.eu
  • VulnCheck KEVConfirmed exploitationCVE-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

    vulncheck.com

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • VulnCheck KEVNov 6, 2026
  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • EUVDNov 3, 2026