CVE-2022-50912

CRITICAL
2026-01-13 [email protected]
9.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
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
Feb 03, 2026 - 19:26 vuln.today
Public exploit code
CVE Published
Jan 13, 2026 - 23:15 nvd
CRITICAL 9.8

Tags

PHP Impresscms

Description

ImpressCMS 1.4.4 contains a file upload vulnerability with weak extension sanitization that allows attackers to upload potentially malicious files. Attackers can bypass file upload restrictions by using alternative file extensions .php2.php6.php7.phps.pht to execute arbitrary PHP code on the server.

Analysis

ImpressCMS 1.4.4 has weak file upload extension filtering that can be bypassed using alternative PHP extensions (.php2, .php6, .php7, .phps, .pht). PoC available.

Technical Context

The upload filter only blocks .php but not alternative PHP extensions (CWE-434). Extensions like .php7, .pht, and others are processed by Apache's PHP handler depending on configuration.

Affected Products

ImpressCMS 1.4.4

Remediation

Implement a whitelist of allowed extensions rather than a blacklist. Restrict PHP processing to .php only in Apache config.

Priority Score

69
Low Medium High Critical
KEV: 0
EPSS: +0.2
CVSS: +49
POC: +20

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CVE-2022-50912 vulnerability details – vuln.today
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