What is the CVSS score of CVE-2025-65840?

CVE-2025-65840 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2025-65840?

Yes, a public proof-of-concept exploit is available for CVE-2025-65840. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-65840?

Within 24 hours: Inventory all PublicCMS V5.202506.b instances in your environment and assess user exposure. Within 7 days: Implement WAF rules to block suspicious cross-origin requests to CkEditorAdminController endpoints, and disable the affected editor feature if business-critical functionality permits. Within 30 days: Evaluate upgrade paths to patched versions, test in staging environments, and execute controlled production deployments with rollback plans.

Publiccms CVE-2025-65840

EUVD-2025-200083 HIGH

Cross-Site Request Forgery (CSRF) (CWE-352)

2025-12-01 cve@mitre.org

CSRF Publiccms

8.8

CVSS 3.1 · Vendor: mitre

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Vulnerability Assessment

Weakness	CWE CWE-352 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V3 - Web Frontend Security Anti-CSRF tokens, SameSite cookies MITRE ATT&CK 1 technique across 1 tactic: Initial Access 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	An attacker can perform state-changing operations (password changes, fund transfers, data deletion) using the victim's authenticated session. With a CVSS score of 8.8 (HIGH), this represents a significant risk.
Exploit ScenarioDerived	An attacker hosts a malicious page that, when visited by an authenticated user, silently submits a forged request to the target application using the user's cookies.

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

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

PublicCMS V5.202506.b is vulnerable to Cross Site Request Forgery (CSRF) in the CkEditorAdminController.

Earlier versions of this analysis (1)

v1 Mar 15, 2026 - 13:34 CVSS 8.8

RemediationAI

Implement anti-CSRF tokens for all state-changing operations. Use SameSite cookie attribute. Verify the Origin/Referer header on the server side.

Affected VersionsENISA

n/a n/a

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

Cross-Site Request Forgery forces authenticated users to perform unintended actions by tricking their browser into sending forged requests. This vulnerability is classified as Cross-Site Request Forgery (CSRF) (CWE-352).

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (mitre) PRIMARY 8.8 HIGH

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

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Dec 04, 2025 - 18:58 vuln.today

Public exploit code

CVE Published

Dec 01, 2025 - 21:15 nvd

HIGH 8.8

Executive ViewAI

Why It Matters

PublicCMS V5.202506.b contains a CSRF vulnerability in the editor controller that allows attackers to perform unauthorized actions on behalf of authenticated users. Organizations using this CMS version face immediate risk of content manipulation, unauthorized administrative changes, and potential data compromise through malicious request forgery.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to enforce SameSite cookie policies and block cross-origin requests to /CkEditorAdminController endpoints. Require CSRF tokens on all state-changing operations via code modification if source access available. Restrict administrative access to whitelisted IP ranges and enforce multi-factor authentication for CMS administrators. Disable the CkEditor functionality if operationally feasible. Monitor for suspicious administrative activity and unauthorized content modifications.

Threat Intelligence Overview

EPSS Score

0.0%

Top 92% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

GitHub

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 Yes

EPSS 0.0%

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.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Request Forgery MEDIUM

Cross-Site Request Forgery exploits the automatic credential inclusion behavior of web browsers.

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References

Advisories & patches

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-65840 ADVISORY https://vuldb.com/vuln/333940

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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