CVE-2023-49819Network attack vector

Authenticated site compromise via PHP object injection

Published Dec 18, 2023 · Updated Apr 28, 2026

PHP object injection in Structured Content (JSON-LD) #wpsc 1.5.3 and earlier allows remote authenticated users to inject objects. Patchstack has not published the affected function, input field, or deserialization operation that accepts the untrusted serialized value. Contributor access and a usable POP chain are required; the chain can execute code, manipulate data, traverse paths, or interrupt service.

CVSS severity9.8
Critical
EPSS probability0.75%
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 Structured Content (JSON-LD) #wpsc 1.5.3 and earlier allows remote authenticated users to inject objects. Patchstack has not published the affected function, input field, or deserialization operation that accepts the untrusted serialized value. Contributor access and a usable POP chain are required; the chain can execute code, manipulate data, traverse paths, or interrupt service.

The record

CVE
CVE-2023-49819
Published
Dec 18, 2023
Updated
Apr 28, 2026
Vendor
Gordon Böhme, Antonio Leutsch
Product
Structured Content (JSON-LD) #wpsc
Classifications
CWE-502
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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 <=1.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Gordon Böhme, Antonio Leutsch · Structured Content (JSON-LD) #wpscversion=n/a <=1.5.3

Published CVSS scores

7.5PatchstackCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data

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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