CVE-2025-4413Network attack vector

Authenticated arbitrary file upload via missing validation

Published Jun 18, 2025 · Updated Apr 8, 2026

Arbitrary file upload in ByREV Pixabay Images 3.4 and earlier allows remote authenticated users to place files on the WordPress server. The pixabay_upload function accepts attacker-controlled content without checking its file type before saving the upload. Author-level access or higher is required; executable content served by the site grants code execution under the web server account.

CVSS severity8.8
High
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in ByREV Pixabay Images 3.4 and earlier allows remote authenticated users to place files on the WordPress server. The pixabay_upload function accepts attacker-controlled content without checking its file type before saving the upload. Author-level access or higher is required; executable content served by the site grants code execution under the web server account.

The record

CVE
CVE-2025-4413
Published
Jun 18, 2025
Updated
Apr 8, 2026
Vendor
ByREV
Product
Pixabay Images
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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.

  1. Affected versionversion=0 <=3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ByREV · Pixabay Imagesversion=0 <=3.4

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web Shell

Public exploit references

No public exploit references are available in this record.

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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