CVE-2023-3154Public exploitNetwork attack vector

Server resource access via unvalidated PHAR path

Published Oct 16, 2023 · Updated Sep 16, 2024

PHAR deserialization in NextGEN Gallery before 3.39 allows remote authenticated users to access server resources via gallery edits. The gallery_edit task accepts an attacker-controlled extra_data tmp_name using the phar:// wrapper and passes it into upload processing without validating the resource path. Administrator access, PHP 7.4 or earlier, a crafted PHAR already on the server, and a usable gadget are required; the demonstrated consequence is object deserialization.

CVSS severity7.5
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

PHAR deserialization in NextGEN Gallery before 3.39 allows remote authenticated users to access server resources via gallery edits. The gallery_edit task accepts an attacker-controlled extra_data tmp_name using the phar:// wrapper and passes it into upload processing without validating the resource path. Administrator access, PHP 7.4 or earlier, a crafted PHAR already on the server, and a usable gadget are required; the demonstrated consequence is object deserialization.

The record

CVE
CVE-2023-3154
Published
Oct 16, 2023
Updated
Sep 16, 2024
Vendor
Sandhills Development, LLC
Product
NextGEN Gallery
Classifications
CWE-502, CAPEC-586, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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 <3.39

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Sandhills Development, LLC · NextGEN Galleryversion=0 <3.39

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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
CAPEC-586Object Injection
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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