What is the CVSS score of CVE-2023-6827?

CVE-2023-6827 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 9.6%.

Is there a patch available for CVE-2023-6827?

Yes, a patch is available for CVE-2023-6827. Update the affected software to the latest version immediately.

Essential Real Estate CVE-2023-6827

HIGH

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

2023-12-15 security@wordfence.com

WordPress RCE File Upload Essential Real Estate Wordpress Plugin G5Plus

7.5

CVSS 3.1 · NVD

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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 score of 7.5 (HIGH). Attack characteristics: network attack vector, high complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 9.63%.
Exploit ScenarioDerived	A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application.

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

Patch available 9.6% exploitation probability (EPSS)

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AnalysisAI

The Essential Real Estate plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation on the 'ajaxUploadFonts' function in versions up to, and including,. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. This Unrestricted File Upload vulnerability could allow attackers to upload malicious files that can be executed on the server.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.

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 is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. The Essential Real Estate plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation on the 'ajaxUploadFonts' function in versions up to, and including, 4.3.5. This makes it possible for authenticated attackers with subscriber-level capabilities or above, to upload arbitrary files on the affected site's server which may make remote code execution possible. CVE-2023-6140 appears to be a duplicate of this issue. Affected products include: G5Plus Essential Real Estate.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:H/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

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Apr 08, 2026 - 18:22 nvd

Patch available

CVE Published

Dec 15, 2023 - 08:15 nvd

HIGH 7.5

DescriptionCVE.org

The Essential Real Estate plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation on the 'ajaxUploadFonts' function in versions up to, and including, 4.3.5. This makes it possible for authenticated attackers with subscriber-level capabilities or above, to upload arbitrary files on the affected site's server which may make remote code execution possible. CVE-2023-6140 appears to be a duplicate of this issue.

Threat Intelligence Overview

EPSS Score

9.6%

Top 7% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

VulDB

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 No

EPSS 9.6%

Patch available Yes

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.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +10

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Malicious File Upload HIGH

Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.

Remote Code Execution CRITICAL

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

Affected Products (CPE)CVE.org

cpe:2.3:a:g5plus:essential_real_estate:*:*:*:*:*:wordpress:*:*

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CVE-2023-6140 HIGH This Week POC

8.8 Jan 08

The Essential Real Estate WordPress plugin before 4.4.0 does not prevent users with limited privileges on the site, like

CVE-2023-6139 MEDIUM This Month POC

6.5 Jan 08

The Essential Real Estate WordPress plugin before 4.4.0 does not apply proper capability checks on its AJAX actions, whi

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References

Advisories & patches

PATCH https://plugins.trac.wordpress.org/changeset/3009780/essential-real-estate ADVISORY https://vuldb.com/vuln/248140 REF https://plugins.trac.wordpress.org/browser/essential-real-estate/tags/4.3.5/lib/smart-framework/core/fonts/fonts.class.php#L524 REF https://www.wordfence.com/threat-intel/vulnerabilities/id/8bb2ce22-077b-41dd-a2ff-cc1db9d20d38?source=cve

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