CVE-2024-28890Network attack vector

Unauthenticated site alteration via dangerous file upload

Published Apr 23, 2024 · Updated Nov 18, 2024

Unrestricted file upload in WPMU DEV Forminator before 1.29.0 allows remote attackers to read server files, alter sites, or interrupt service. The public form upload path accepts dangerous file types without effective restriction, and no account or user interaction is required. CISA separately marks every Broken Link Checker version as affected, but no public record explains its mechanism, gate, or impact.

CVSS severity9.8
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in WPMU DEV Forminator before 1.29.0 allows remote attackers to read server files, alter sites, or interrupt service. The public form upload path accepts dangerous file types without effective restriction, and no account or user interaction is required. CISA separately marks every Broken Link Checker version as affected, but no public record explains its mechanism, gate, or impact.

The record

CVE
CVE-2024-28890
Published
Apr 23, 2024
Updated
Nov 18, 2024
Vendor
WPMU DEV
Product
Forminator
Classifications
CWE-434, T1105
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 18, 2024Record 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=prior to 1.29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPMU DEV · Forminatorversion=prior to 1.29.0
WPMU DEV · Broken Link Checkerversion=*

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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