CVE-2023-2497Network attack vector

PHP object injection via unsafe settings deserialization

Published Nov 22, 2023 · Updated Apr 8, 2026

PHP object injection in DeluxeThemes UserPro 5.1.0 and earlier allows remote attackers to invoke unsafe deserialization via a forged request. The import_settings function accepts user-supplied settings without effective nonce validation and passes the supplied value to PHP unserialize(). Exploitation requires a site administrator to act on an attacker-controlled link, after which a suitable object chain can compromise site data or interrupt service.

CVSS severity8.8
High
EPSS probability0.27%
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 DeluxeThemes UserPro 5.1.0 and earlier allows remote attackers to invoke unsafe deserialization via a forged request. The import_settings function accepts user-supplied settings without effective nonce validation and passes the supplied value to PHP unserialize(). Exploitation requires a site administrator to act on an attacker-controlled link, after which a suitable object chain can compromise site data or interrupt service.

The record

CVE
CVE-2023-2497
Published
Nov 22, 2023
Updated
Apr 8, 2026
Vendor
DeluxeThemes
Product
UserPro
Classifications
CWE-352, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=0 <=5.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DeluxeThemes · UserProversion=0 <=5.1.0

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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-352Cross-Site Request Forgery (CSRF)
T1190Exploit Public-Facing Application

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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