CVE-2026-103999Ultra Addons for Contact Form 7 <= 3.5.54 - Unauthenticated Stored Cross-Site Scripting via File Upload
Updated under an hour ago ()
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It affects themefic Ultra Addons for Contact Form 7. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.26%, higher than 16% of scored CVEs.
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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.
- CVSS
- 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.26% (percentile 16)
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 16, 2026
Affected products
themefic Ultra Addons for Contact Form 7 themefic:ultra_addons_for_contact_form_7 (from the name) | through 3.5.54 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/29b9d978-f8b0-48f9-a10e-7e61a4f4a828?source=cve
- https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.52/addons/database/database.php#L901
- https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.52/addons/database/database.php#L895
- https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.52/addons/database/database.php#L869
- https://plugins.trac.wordpress.org/browser/ultimate-addons-for-contact-form-7/tags/3.5.52/inc/functions.php#L1703
- https://downloads.wordpress.org/plugin/ultimate-addons-for-contact-form-7.zip
- https://plugins.trac.wordpress.org/changeset/3738548/ultimate-addons-for-contact-form-7/trunk/addons/database/database.php
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.