CVE-2023-5965Network attack vector

Admin PHP code execution via crafted update ZIP

Published Nov 30, 2023 · Updated Apr 20, 2026

Unrestricted ZIP upload in EspoCRM 7.5.2 and earlier allows remote authenticated users with administrative privileges to execute PHP code. The update form accepts a crafted ZIP package that results in server-side PHP execution; public records do not identify the missing validation or extraction check. Administrative access to the upgrade interface is required, and successful exploitation compromises the server with the web process's permissions.

CVSS severity4.7
Medium
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted ZIP upload in EspoCRM 7.5.2 and earlier allows remote authenticated users with administrative privileges to execute PHP code. The update form accepts a crafted ZIP package that results in server-side PHP execution; public records do not identify the missing validation or extraction check. Administrative access to the upgrade interface is required, and successful exploitation compromises the server with the web process's permissions.

The record

CVE
CVE-2023-5965
Published
Nov 30, 2023
Updated
Apr 20, 2026
Vendor
EspoCRM
Product
EspoCRM
Classifications
CWE-434, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 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 <=7.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

EspoCRM · EspoCRMversion=0 <=7.5.2

Published CVSS scores

4.7Spanish National Cybersecurity Institute, S.A. (INCIBE)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
7.2NIST National Vulnerability DatabaseCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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