What is the CVSS score of CVE-2026-63281?

CVE-2026-63281 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.2%.

Advanced Module Manager Extension For Joomla CVE-2026-63281

EUVD-2026-47806 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-07-22 Joomla

XSS Advanced Module Manager Extension For Joomla Conditional Content Extension For Joomla Content Templater Pro Extension For Joomla Rereplacer Extension Pro For Joomla Regularlabs Com

4.8

CVSS 3.1 · Vendor: Joomla

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Vulnerability Assessment

Weakness

CWE

CWE-79

OWASP Top 10:2025

A05:2025 - Injection

ASVS 5.0

V1 - Encoding and Sanitization Output encoding, context-aware escaping

MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Execution

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 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Stored cross-site scripting in Regular Labs Conditional Content and related Joomla extensions enables authenticated administrators to execute

Affected VersionsENISA

Content Templater Pro extension for Joomla 1.0.0-13.0.0

ReReplacer extension Pro for Joomla 1.0.0-15.0.3

Conditional Content extension for Joomla 1.0.0-6.0.0

Advanced Module Manager extension for Joomla 1.0.0-11.0.1

Affected Packages

euvd advanced_module_manager_extension_for_joomla no fix

euvd conditional_content_extension_for_joomla no fix

euvd content_templater_pro_extension_for_joomla no fix

euvd rereplacer_extension_pro_for_joomla no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 4 packages 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 4.8 MEDIUM

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

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVSS changed

Jul 27, 2026 - 14:22 NVD

4.8 (MEDIUM)

CVE Published

Jul 22, 2026 - 20:40 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

Stored condition values could also execute HTML/JavaScript in administrator summaries.

Threat Intelligence Overview

EPSS Score

0.2%

Top 89% exploitable

Social Media

Sightings

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment CIRCL

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 0.2%

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.