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TI-2026-75184 Aliases CVE-2026-103999GHSA-3658-jvcq-xc7g

Stored cross-site scripting in Ultra Addons for Contact Form 7

Priority LOW 31CWE-79Published · Updated

Key facts

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

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

Summary

The Ultra Addons for Contact Form 7 plugin for WordPress by themefic is affected in all versions up to and including 3.5.54. Insufficient input sanitization and output escaping (CWE-79) lets unauthenticated attackers store arbitrary web scripts through file uploads. The upload blocklist accepts text-type files whose contents begin with HTML, so the scripts run in the browser of any user who opens an injected page.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The Ultra Addons for Contact Form 7 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via File Upload in all versions up to, and including, 3.5.54 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The extension blocklist gatekeeper is bypassed by uploading text-type files (.txt, .csv, .vtt, .srt, .asc) whose contents begin with an HTML payload such as '<BODY onload=…>', as the check classifies these files as text/plain without inspecting their byte content.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00259 17th 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
ThemeficUltra Addons for Contact Form 7up to 3.5.54—No fix listedCNA
  • Ultra Addons for Contact Form 7 VendorThemefic Affected up to 3.5.54 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:themefic:ultimate_addons_for_contact_form_7:*:*:*:*:*:*:*:*——Themefic
  • cpe:2.3:a:themefic:ultimate_addons_for_contact_form_7:*:*:*:*:*:*:*:* Versions — — ·Themefic

Remediation

The sources list no fixed version for Ultra Addons for Contact Form 7.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-103999
  2. 2026-10-16 CISA SSVC decision points changed
  3. 2026-10-16 Priority changed: MEDIUM → LOW
  4. 2026-10-16 Alias added: GHSA-3658-jvcq-xc7g

References

Other 7

  • TI-2023-02626 Ultimate Addons for Contact Form 7 < 3.1.29 - Reflected XSS CVSS 3.1MEDIUM 6.1
  • TI-2026-57195 Ultra Addons for Contact Form 7 <= 3.5.50 - Unauthenticated Arbitrary File Upload via Signature Form Field CVSS 3.1CRITICAL 9.8
  • TI-2023-02625 Ultimate Addons for Contact Form 7 < 3.1.29 - Admin+ Stored XSS CVSS 3.1MEDIUM 4.8
  • TI-2026-83954 Arbitrary file deletion in Ultra Addons for Contact Form 7 CVSS 3.1CRITICAL 9.8
  • TI-2024-19308 WordPress Tourfic plugin <= 2.11.15 - Arbitrary File Upload vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2022-23624 WordPress Ultimate Addons for Contact Form 7 Plugin <= 3.1.23 is vulnerable to SQL Injection CVSS 3.1CRITICAL 9.8
See all 59 →

Sources

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