CVE-2026-90905
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CSRF and Access Control Bypass in Easy Store Joomla Extension

Vulnerability report for CVE-2026-90905, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: Joomla! Project

Description

Joomla Extension - joomshaper.com - Missing CSRF and Access Control on Site Configuration Update in Easy Store extension 1.0.0-3.0.0 - The endpoint administrator/index.php?option=com_easystore&task=appconfig.updateConfiguration updated core Joomla mail configuration (fromname, mailfrom) in configuration.php without verifying anti-CSRF tokens or checking for administrative permissions (canAdmin). A malicious site could silently modify the site's sender name and email address via forged requests from an admin's browser. Resolved by enforcing Session::checkToken('request') / Session::checkToken('post') and adding explicit administrative authorization verification via AccessControl::create()->canAdmin().

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-24
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
joomshaper easystore From 1.0.0 (inc) to 3.0.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CWE-352 The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

Attack-Flow Graph

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Executive Summary

This vulnerability is a Missing Cross-Site Request Forgery (CSRF) and improper access control flaw in the Easy Store Joomla extension versions 1.0.0 to 3.0.0. It allows an attacker to modify core Joomla mail settings like sender name and email address without proper authorization or CSRF protection.

Detection Guidance

Check Joomla administrator logs for unauthorized POST requests to administrator/index.php?option=com_easystore&task=appconfig.updateConfiguration. Inspect configuration.php for unexpected changes to mailfrom or fromname settings.

Impact Analysis

An attacker could trick an admin into clicking a malicious link, causing the site to send emails from a spoofed address. This could lead to phishing attacks, reputation damage, or unauthorized use of the mail system.

Mitigation Strategies

Update the Easy Store extension to the latest patched version. Review and restrict administrative access to Joomla backend. Monitor configuration.php for unauthorized modifications.

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