CVE-2023-5583Network attack vector

Authenticated object injection via shortcode metadata deserialization

Published Oct 30, 2023 · Updated Apr 8, 2026

PHP object injection in WP Simple Galleries 1.34 and earlier allows remote authenticated users to inject objects through a gallery shortcode. The wpsgallery shortcode handler passes the wpsimplegallery_gallery post-meta value to unserialize() without restricting the resulting object type. Contributor-level access is required; file deletion, data disclosure, or code execution additionally requires a usable POP chain from another installed plugin or theme.

CVSS severity8.8
High
EPSS probability1.01%
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 WP Simple Galleries 1.34 and earlier allows remote authenticated users to inject objects through a gallery shortcode. The wpsgallery shortcode handler passes the wpsimplegallery_gallery post-meta value to unserialize() without restricting the resulting object type. Contributor-level access is required; file deletion, data disclosure, or code execution additionally requires a usable POP chain from another installed plugin or theme.

The record

CVE
CVE-2023-5583
Published
Oct 30, 2023
Updated
Apr 8, 2026
Vendor
maca134
Product
WP Simple Galleries
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 30, 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 <=1.34

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

maca134 · WP Simple Galleriesversion=0 <=1.34

Published CVSS scores

8.8NISTCVSS:3.1/AV:N/AC:L/PR:L/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
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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