CVE-2021-47904

HIGH

PhreeBooks 5.2.3 - Authenticated RCE

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2021-47904. PoCs published by Kr0ff, Metin Yunus Kandemir.

AI-analyzed exploit summary This exploit demonstrates an authenticated remote code execution vulnerability in PhreeBooks 5.2.3 via unrestricted file upload in the 'Image Manager' section. It uploads a PHP web shell to execute arbitrary commands on the target system.

Description

PhreeBooks 5.2.3 contains an authenticated file upload vulnerability in the Image Manager that allows remote code execution. Attackers can upload a malicious PHP web shell by exploiting unrestricted file type uploads to gain command execution on the server.

Exploits (2)

exploitdb WORKING POC
by Kr0ff · pythonwebappsphp
https://www.exploit-db.com/exploits/49524

This exploit demonstrates an authenticated remote code execution vulnerability in PhreeBooks 5.2.3 via unrestricted file upload in the 'Image Manager' section. It uploads a PHP web shell to execute arbitrary commands on the target system.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: PhreeBooks 5.2.3
Auth required
Prerequisites: Valid credentials for PhreeBooks · Access to the 'Image Manager' section
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC
by Metin Yunus Kandemir · pythonremotepython
https://www.exploit-db.com/exploits/46645

This exploit demonstrates a remote command execution vulnerability in PhreeBooks ERP 5.2.3 by uploading a malicious PHP file through the Image Manager due to lack of file extension controls. It authenticates, uploads a reverse shell payload, and executes it to establish a connection to an attacker-controlled server.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: PhreeBooks ERP v5.2.3
Auth required
Prerequisites: Valid user credentials · Network access to the target · Listener set up on attacker's machine
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (5)

Core 5
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/49524
Various Sources product
https://www.phreesoft.com/
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/46645

Scores

CVSS v3 8.8
EPSS 0.0061
EPSS Percentile 44.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-434
Status published
Products (1)
Phreesoft/PhreeBooks 5.2.3
Published Jan 23, 2026
Tracked Since Feb 18, 2026