CVE-2026-39560Network attack vector

Unauthenticated object injection via untrusted deserialization

Published Jun 17, 2026 · Updated Jun 17, 2026

PHP object injection in Select-Themes Hiroshi 1.5.1 and earlier allows remote attackers to inject objects through untrusted deserialization. The public advisories identify deserialization of untrusted input but do not disclose the affected parameter, request path, or function. No usable POP chain exists in the theme itself, so file deletion, data retrieval, or code execution requires a compatible gadget chain from another installed plugin or theme.

CVSS severity8.1
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHP object injection in Select-Themes Hiroshi 1.5.1 and earlier allows remote attackers to inject objects through untrusted deserialization. The public advisories identify deserialization of untrusted input but do not disclose the affected parameter, request path, or function. No usable POP chain exists in the theme itself, so file deletion, data retrieval, or code execution requires a compatible gadget chain from another installed plugin or theme.

The record

CVE
CVE-2026-39560
Published
Jun 17, 2026
Updated
Jun 17, 2026
Vendor
Select-Themes
Product
Hiroshi
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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 <=1.5.1 changes=[{"at":"1.6","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Select-Themes · Hiroshiversion=n/a <=1.5.1 changes=[{"at":"1.6","status":"unaffected"}]

Published CVSS scores

8.1PatchstackCVSS:3.1/AV:N/AC:H/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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