CVE-2013-4144Public exploitNetwork attack vector

Content spoofing via unrestricted button image URL

Published Jun 30, 2022 · Updated Aug 6, 2024

Object injection in WordPress.org SWFUpload in WordPress 3.5.2 allows remote attackers to display arbitrary images via buttonImageURL. The SWF file accepts an unrestricted buttonImageURL value and loads the referenced cross-origin image instead of limiting the button graphic to the site's origin. An attacker must cause the Flash upload control to receive the crafted parameter; the resulting image substitution can spoof trusted page content.

CVSS severity9.8
Critical
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object injection in WordPress.org SWFUpload in WordPress 3.5.2 allows remote attackers to display arbitrary images via buttonImageURL. The SWF file accepts an unrestricted buttonImageURL value and loads the referenced cross-origin image instead of limiting the button graphic to the site's origin. An attacker must cause the Flash upload control to receive the crafted parameter; the resulting image substitution can spoof trusted page content.

The record

CVE
CVE-2013-4144
Published
Jun 30, 2022
Updated
Aug 6, 2024
Vendor
WordPress.org
Product
SWFUpload
Classifications
CWE-20, CWE-74
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=wordpress 3.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WordPress.org · SWFUploadversion=wordpress 3.5.2

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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 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 exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Public exploit references

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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