What is the CVSS score of CVE-2025-27754?

CVE-2025-27754 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Joomla are affected by CVE-2025-27754?

CVE-2025-27754 presents notable security risk, a cross-site scripting vulnerability rated CVSS 6.5. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

How to fix or mitigate CVE-2025-27754?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Joomla CVE-2025-27754

EUVD-2025-17001 MEDIUM

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

2025-06-05 security@joomla.org

XSS Joomla

6.5

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 17:53 euvd

EUVD-2025-17001

Analysis Generated

Mar 14, 2026 - 17:53 vuln.today

CVE Published

Jun 05, 2025 - 14:15 nvd

MEDIUM 6.5

DescriptionNVD

A stored XSS vulnerability in RSBlog! component 1.11.6 - 1.14.4 for Joomla was discovered. The vulnerability allows authenticated users to inject malicious JavaScript into the plugin's resource. The injected payload is stored by the application and later executed when other users view the affected content.

Analysis

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

CVE-2025-27754 vulnerability details – vuln.today

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