CVE-2023-1549Public exploitNetwork attack vector

PHP object injection via settings import

Published May 15, 2023 · Updated Jan 24, 2025

PHP object injection in Spacetime Ad Inserter before 2.7.27 allows remote authenticated users to invoke a gadget chain via settings data. The settings import path base64-decodes export_settings_0 and unserializes the attacker-controlled object when import_block_0 is set. Administrator access to WordPress settings and a suitable gadget are required; exploitation triggers the gadget's magic methods and associated effects.

CVSS severity7.2
High
EPSS probability16.90%
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 Spacetime Ad Inserter before 2.7.27 allows remote authenticated users to invoke a gadget chain via settings data. The settings import path base64-decodes export_settings_0 and unserializes the attacker-controlled object when import_block_0 is set. Administrator access to WordPress settings and a suitable gadget are required; exploitation triggers the gadget's magic methods and associated effects.

The record

CVE
CVE-2023-1549
Published
May 15, 2023
Updated
Jan 24, 2025
Vendor
Spacetime
Product
Ad Inserter
Classifications
CWE-502, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 24, 2025Record 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 <2.7.27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Spacetime · Ad Inserterversion=0 <2.7.27

Published CVSS scores

7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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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