CVE-2021-46116Public exploitNetwork attack vector

Admin code execution via malicious template installation

Published Jan 26, 2022 · Updated Jul 9, 2026

Unrestricted template upload in JPress 4.2.0 allows remote authenticated users to execute arbitrary code through the admin panel. The doInstall method extracts an uploaded ZIP into classes/webapp/templates, where template preview evaluates attacker-supplied JavaScript through ScriptEngineManager. Access requires an authenticated administrator able to install and preview templates; successful exploitation runs commands with the JPress process's privileges.

CVSS severity7.2
High
EPSS probability2.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted template upload in JPress 4.2.0 allows remote authenticated users to execute arbitrary code through the admin panel. The doInstall method extracts an uploaded ZIP into classes/webapp/templates, where template preview evaluates attacker-supplied JavaScript through ScriptEngineManager. Access requires an authenticated administrator able to install and preview templates; successful exploitation runs commands with the JPress process's privileges.

The record

CVE
CVE-2021-46116
Published
Jan 26, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1059.007Command and Scripting Interpreter: JavaScript

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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