What is the CVSS score of CVE-2026-64871?

CVE-2026-64871 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Cache Cleaner Extension For Joomla CVE-2026-64871

EUVD-2026-47896 MEDIUM

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

2026-07-23 Joomla

GHSA-49jw-c4hx-66m6

CSRF Cache Cleaner Extension For Joomla Regularlabs Com

5.4

CVSS 3.1 · Vendor: Joomla

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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.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Cross-site request forgery in the Cache Cleaner extension for Joomla allows an authenticated administrator with cache-management permission to be tricked into performing unauthorized URL purges due to inconsistent token validation. Affected versions 1.0.0 through 9.7.6 may experience limited confidentiality and integrity compromise. No public exploit or active exploitation has been identified, and the EPSS score is low (0.13%).

Affected VersionsENISA

Cache Cleaner extension for Joomla 1.0.0-9.7.6

Affected Packages

euvd cache_cleaner_extension_for_joomla 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.

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Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Joomla) PRIMARY 5.4 MEDIUM

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

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

CVSS VectorVendor: Joomla

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVSS changed

Jul 24, 2026 - 20:22 NVD

5.4 (MEDIUM)

CVE Published

Jul 23, 2026 - 09:14 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

Administrator URL purges did not consistently require a valid token and cache-management permission.

Threat Intelligence Overview

EPSS Score

0.1%

Top 97% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment

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 MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

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.