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CVE-2023-5966

HighPublished

Unrestricted Upload of File with Dangerous Type in EspoCRM

Published: Nov 30, 2023
Updated: Apr 20, 2026
Assigning CNA: INCIBE
Evidence observed: Aug 8, 2026

Primary CVSS

7.2/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

1.0%

Low · next 30 days

Percentile: 62.0%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

An authenticated privileged attacker could upload a specially crafted zip to the EspoCRM server in version 7.2.5, via the extension deployment form, which could lead to arbitrary PHP code execution.

Sources

cve-2023-5966PoC
Proof-of-concept exploit for CVE-2023-5966, an arbitrary file upload vulnerability in EspoCRM 2.7.4 and earlier, enabling remote code execution via a web shell.
CVE-2023-5965PoC
Proof-of-concept exploit for authenticated arbitrary PHP code execution in EspoCRM 7.2.5 via malicious zip upload, including a web shell payload.

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