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PHP CVE-2025-52921

| EUVDEUVD-2025-18868 CRITICAL
Unprotected Alternate Channel (CWE-420)
2025-06-23 cve@mitre.org
9.9
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V13 - Configuration Unprotected alternate channel
Impact

CVSS 9.9. EPSS 0.2%. No patch confirmed.

Exploit ScenarioDerived

An attacker could send a specially crafted request to Innoshop to execute arbitrary code on the underlying server, potentially gaining full control of the system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

A remote code execution vulnerability in Innoshop (CVSS 9.9). Critical severity with potential for significant impact on affected systems.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 22:10 CVSS 9.9

In Innoshop through 0.4.1, an authenticated attacker could exploit the File Manager functions in the admin panel to achieve code execution on the server, by uploading a crafted file and then renaming

RemediationAI

Monitor vendor channels for patch availability.

Affected VersionsENISA

InnoShop 0 ≤0.4.1

Affected Packages

euvd innoshop no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Vulnerability type: remote code execution. CVSS 9.9 indicates critical severity with likely remote exploitation vector. Affects Innoshop.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.9 CRITICAL
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
Low

DescriptionCVE.org

In Innoshop through 0.4.1, an authenticated attacker could exploit the File Manager functions in the admin panel to achieve code execution on the server, by uploading a crafted file and then renaming it to have a .php extension by using the Rename Function. This bypasses the initial check that uploaded files are image files. The application relies on frontend checks to restrict the administrator from changing the extension of uploaded files to .php. This restriction is easily bypassed with any proxy tool (e.g., BurpSuite). Once the attacker renames the file, and gives it the .php extension, a GET request can be used to trigger the execution of code on the server.

Executive ViewAI

Why It Matters

Innoshop versions through 0.4.1 contain a critical vulnerability allowing authenticated administrators to execute arbitrary code on servers through file upload manipulation, with no available patch. Any organization running this software faces complete server compromise risk and should immediately assess deployment scope and implement emergency mitigations.

Business Impact: Severe
Compensating Controls

Disable File Manager functionality entirely in admin panel settings if available; implement WAF rules to block HTTP requests containing 'rename' operations targeting upload directories; restrict admin panel access via IP whitelist or VPN gateway; monitor file system for .php files in upload directories; implement strict file integrity monitoring on web root directories; consider network segmentation to limit blast radius if compromise occurs.

Threat Intelligence Overview

EPSS Score
0.2%
Top 63% exploitable
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Very High

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +50
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

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