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NVD / CVE Program· CNA Wordfence

CVE-2026-5718: Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.7 - Unauthenticated Arbitrary File Upload via Non-ASCII Filename Blacklist Bypass

Noroxi assessment

Priority: Monitor (action score 33/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.1% (FIRST EPSS); higher than 90.9% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: glenwpcoder Drag and Drop Multiple File Upload for Contact Form 7 1.3.9.7.

Low priority for now. Upgrade to glenwpcoder Drag and Drop Multiple File Upload for Contact Form 7 1.3.9.7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The Drag and Drop Multiple File Upload for Contact Form 7 plugin for WordPress is vulnerable to arbitrary file upload in versions up to, and including, 1.3.9.7. This is due to insufficient file type validation that occurs when custom blacklist types are configured, which replaces the default dangerous extension denylist instead of merging with it, and the wpcf7_antiscript_file_name() sanitization function being bypassed for filenames containing non-ASCII characters. This makes it possible for unauthenticated attackers to upload arbitrary files, such as PHP files, to the server, which can be leveraged to achieve remote code execution. The vulnerability was originally reported by Leonid Semenenko (lsemenenko) and partially patched in version 1.3.9.7. A bypass for the patch was separately discovered and reported by Nguyen Hung (Mitchell).

HighCVSS 8.1 · v3.1—Proof of concept Fix available
Published
Apr 17, 2026
Updated
Jun 17, 2026
EPSS
4.1% · 90th percentile

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Wordfence
8.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Wordfence). Independent of NVD's CPE analysis and usually ahead of it.

  • glenwpcoder Drag and Drop Multiple File Upload for Contact Form 7

    • up to and including 1.3.9.7affected · semver

Same product

glenwpcoder: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-3459Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.5 - Unauthenticated Arbitrary File Upload
    32Monitor
  • CVE-2026-5710Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.6 - Unauthenticated Limited Arbitrary File Read via mfile Field
    30Monitor
  • CVE-2025-14842Drag and Drop Multiple File Upload – Contact Form 7 <= 1.3.9.2 - Unauthenticated Limited Arbitrary File Upload
    24Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-8464Aug 16, 2025 · Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.0 - Directory Traversal via `wpcf7_guest_user_id` Cookie
    21Monitor
  • Later →CVE-2026-8991Jun 6, 2026 · Drag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.7 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'drag_n_drop_text' and 'drag_n
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
glenwpcoder Drag and Drop Multiple File Upload for Contact Form 71.3.9.7 · descriptionVendor (CNA)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×4

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2026-5718 —
Proof-of-concept repository on GitHubstars:12026-05-08
Proof-of-concept repository on GitHubstars:12026-05-12
Proof-of-concept repository on GitHubstars:02026-05-26
Proof-of-concept repository on GitHubstars:02026-06-10

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+20 d
  3. TodayNov 10, 2026+207 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-345943 days apartDrag and Drop Multiple File Upload for Contact Form 7 <= 1.3.9.5 - Unauthenticated Arbitrary File Upload
    32Monitor
  • CVE-2025-14842100 days apartDrag and Drop Multiple File Upload – Contact Form 7 <= 1.3.9.2 - Unauthenticated Limited Arbitrary File Upload
    24Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-434 · Unrestricted Upload of File with Dangerous Type

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records