Unauthenticated browser-session compromise via stored filename injection
Published Jun 15, 2026 · Updated Jun 15, 2026
Stored XSS in Drag and Drop Multiple File Upload for Contact Form 7 1.3.9.7 and earlier allows remote attackers to inject scripts. The unauthenticated dnd-cf7-upload AJAX action accepts a script-bearing filename, which the plugin stores and later renders without output encoding. A privileged user must view the injected output; the script then runs in the site's origin and can access browser-session data or alter page content.
Summary
What happened
Stored XSS in Drag and Drop Multiple File Upload for Contact Form 7 1.3.9.7 and earlier allows remote attackers to inject scripts. The unauthenticated dnd-cf7-upload AJAX action accepts a script-bearing filename, which the plugin stores and later renders without output encoding. A privileged user must view the injected output; the script then runs in the site's origin and can access browser-session data or alter page content.
The record
- CVE
- CVE-2026-49055
- Published
- Jun 15, 2026
- Updated
- Jun 15, 2026
- Vendor
- Glen Don Mongaya
- Product
- Drag and Drop Multiple File Upload for Contact Form 7
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 15, 2026CVE publishedPublication date reported by the CVE source.
- Jun 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a <=1.3.9.7 changes=[{"at":"1.3.9.8","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Atomic Edge unauthenticated stored XSS proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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