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CVE-2026-103999

7.2 high SSVC exploitation: none Deferred
NVD · CVE.org

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.

Fix

STIG rules that mitigate this class

With Gatekeeper enforced, an unsigned or unnotarised app does not run, which is the step most Gatekeeper bypasses need. Apple Platform Security, "Gatekeeper and runtime protection in macOS" (the owner's mapping, data/mitigations.yaml: gatekeeper)

  • APPL-15-002064 CAT I The macOS system must enable gatekeeper. Apple macOS 15 (Sequoia)
  • APPL-26-002064 CAT I The macOS system must enable gatekeeper. Apple macOS 26 (Tahoe)

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 2

  1. StatusReceived → DeferredNVD modified 2026-10-16 15:17
  2. First seenCVSS 7.2NVD modified 2026-10-16 06:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 7