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TI-2026-21930 Aliases CVE-2026-27536GHSA-9qcm-96gr-2cxq

WordPress MailChimp Subscribe Forms plugin <= 4.3.3 - Cross Site Scripting (XSS) vulnerability

Priority LOW 31CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Unauthenticated Cross Site Scripting (XSS) in MailChimp Subscribe Forms <= 4.3.3 versions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00251 16th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PluginOpsMailChimp Subscribe Formsup to 4.3.3—No fix listedCNA
  • MailChimp Subscribe Forms VendorPluginOps Affected up to 4.3.3 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27536
  2. 2026-10-03 Alias added: GHSA-9qcm-96gr-2cxq

References

Other 1

  • TI-2022-04314 Landing Page Builder < 1.4.9.9 - Contributor+ Cross-Site Scripting via Shortcode CVSS 3.1MEDIUM 5.4
  • TI-2025-37492 WordPress Testimonial Slider Plugin <= 3.5.8.6 - Local File Inclusion Vulnerability CVSS 3.1HIGH 8.8
  • TI-2024-28997 WordPress Landing Page Builder plugin <= 1.5.2.0 - Local File Inclusion vulnerability CVSS 3.1HIGH 7.5
  • TI-2026-41274 WordPress Landing Page Builder plugin <= 1.5.3.5 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
  • TI-2024-23043 WordPress Landing Page Builder <= 1.5.1.8 - Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
  • TI-2024-34762 WordPress Social Locker plugin <= 1.1 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences