What is the CVSS score of CVE-2021-47788?

CVE-2021-47788 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Is there a public PoC exploit available for CVE-2021-47788?

Yes, a public proof-of-concept exploit is available for CVE-2021-47788. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2021-47788?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Review file handling controls and restrict upload directories.

Websitebaker CVE-2021-47788

HIGH

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-01-16 disclosure@vulncheck.com

RCE Websitebaker

8.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-434 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V5 - File Handling File type validation, storage isolation MITRE ATT&CK 2 techniques across 2 tactics: Command and Control, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 8.8 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitation requires authentication. Exploitable via remote/network. Public exploit/POC available.
Exploit ScenarioDerived	A remote attacker (requires authentication) could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Websitebaker versions up to 2.13.0 is affected by unrestricted upload of file with dangerous type (CVSS 8.8).

RemediationAI

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.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

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

Technical ContextAI · show details

This vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affects Websitebaker. WebsiteBaker 2.13.0 contains an authenticated remote code execution vulnerability that allows users with language editing permissions to execute arbitrary code. Attackers can exploit the language installation endpoint by manipulating language installation parameters to achieve remote code execution on the server.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Jan 30, 2026 - 01:02 vuln.today

Public exploit code

CVE Published

Jan 16, 2026 - 00:16 nvd

HIGH 8.8

DescriptionCVE.org

WebsiteBaker 2.13.0 contains an authenticated remote code execution vulnerability that allows users with language editing permissions to execute arbitrary code. Attackers can exploit the language installation endpoint by manipulating language installation parameters to achieve remote code execution on the server.

Executive ViewAI

Why It Matters

Organizations using WebsiteBaker 2.13.0 face significant risk from CVE-2021-47788, a unrestricted file upload vulnerability rated CVSS 8.8. This could allow attackers to access or modify files outside intended directories, potentially exposing sensitive configuration or credentials. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Restrict file upload functionality via WAF; (2) Implement allowlist-based file type validation; (3) Use chroot/containerization to limit filesystem access.

Threat Intelligence Overview

EPSS Score

0.1%

Top 71% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

Exploit-DB

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 HIGH

CISA KEV No

Public POC Yes

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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.