CVE-2013-1916Public exploitNetwork attack vector

Remote code execution via unrestricted photo upload

Published Jun 24, 2022 · Updated Aug 6, 2024

Unrestricted file upload in User Photo 0.9.4 for WordPress allows remote authenticated users to execute a backdoor through a crafted photo upload. The photo-upload handler performs only partial validation, allowing a server-side backdoor file to be stored and called before an administrator approves the image. Exploitation requires an account that can submit a user photo and a server configuration that executes the uploaded file, enabling code execution in the WordPress hosting context.

CVSS severity8.8
High
EPSS probability12.85%
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 User Photo 0.9.4 for WordPress allows remote authenticated users to execute a backdoor through a crafted photo upload. The photo-upload handler performs only partial validation, allowing a server-side backdoor file to be stored and called before an administrator approves the image. Exploitation requires an account that can submit a user photo and a server configuration that executes the uploaded file, enabling code execution in the WordPress hosting context.

The record

CVE
CVE-2013-1916
Published
Jun 24, 2022
Updated
Aug 6, 2024
Vendor
Weston Ruter
Product
User Photo
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 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 Plugin User Photo 0.9.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Weston Ruter · User Photoversion=WordPress Plugin User Photo 0.9.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5NIST NVDAV:N/AC:M/Au:S/C:C/I:C/A:C

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 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 exploitPublished

Weakness, pattern, technique

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

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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