CVE-2023-5966

MEDIUM

EspoCRM < 7.5.2 - Authenticated Arbitrary PHP Code Execution via Extension Deployment Form

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-5966. PoCs published by ll104567.

AI-analyzed exploit summary This PoC demonstrates an arbitrary file upload vulnerability in EspoCRM 2.7.4 and earlier, allowing code execution via the add extension functionality. The provided zip file uploads a web shell to /webshell.php.

Description

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.

Exploits (1)

nomisec WORKING POC
by ll104567 · poc
https://github.com/ll104567/cve-2023-5966

This PoC demonstrates an arbitrary file upload vulnerability in EspoCRM 2.7.4 and earlier, allowing code execution via the add extension functionality. The provided zip file uploads a web shell to /webshell.php.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: EspoCRM <= 2.7.4
Auth required
Prerequisites: Access to the EspoCRM add extension functionality · Valid authentication credentials
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 4.7
EPSS 0.0105
EPSS Percentile 59.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-434
Status published
Products (2)
espocrm/espocrm < 7.5.2
EspoCRM/EspoCRM < 7.5.2
Published Nov 30, 2023
Tracked Since Feb 18, 2026