CVE-2021-47904

HIGH
2026-01-23 [email protected]
8.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 26, 2026 - 15:03 vuln.today
Public exploit code
CVE Published
Jan 23, 2026 - 17:16 nvd
HIGH 8.8

Tags

PHP RCE

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.

Analysis

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. [CVSS 8.8 HIGH]

Technical Context

Classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). Affects Image Manager. 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.

Affected Products

Product: Image Manager.

Remediation

Monitor vendor advisories for a patch. Validate file types by content. Store uploads outside web root. Restrict network access to the affected service where possible.

Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.4
CVSS: +44
POC: +20

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CVE-2021-47904 vulnerability details – vuln.today
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