CVE-2026-57658Network attack vector

Administrator upload of arbitrary executable files

Published Jun 26, 2026 · Updated Jun 26, 2026

Unrestricted file upload in AF Themes TemplateSpare 4.2.0 and earlier allows remote authenticated users to upload arbitrary files. Neither the CNA record nor Patchstack identifies the affected endpoint or the file-type validation operation that accepts dangerous uploads. Administrator privileges are required, and an uploaded backdoor can execute in the WordPress site's server context, enabling code execution and further site access.

CVSS severity9.1
Critical
EPSS probability0.50%
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 AF Themes TemplateSpare 4.2.0 and earlier allows remote authenticated users to upload arbitrary files. Neither the CNA record nor Patchstack identifies the affected endpoint or the file-type validation operation that accepts dangerous uploads. Administrator privileges are required, and an uploaded backdoor can execute in the WordPress site's server context, enabling code execution and further site access.

The record

CVE
CVE-2026-57658
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
TemplateSpare
Product
TemplateSpare
Classifications
CWE-434, CAPEC-17, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=n/a <=4.2.0 changes=[{"at":"4.2.1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

TemplateSpare · TemplateSpareversion=n/a <=4.2.0 changes=[{"at":"4.2.1","status":"unaffected"}]

Published CVSS scores

9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CAPEC-17Using Malicious Files
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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