CVE-2026-90900
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CSRF Bypass in Easy Store Joomla Extension

Vulnerability report for CVE-2026-90900, 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 Token Verification in Storefront Product Review Submission in Easy Store extension 1.0.0-3.0.0 - The product review submission endpoint (index.php?option=com_easystore&task=product.addReview) accepted submissions without verifying an anti-CSRF token (the check had been commented out in code). An attacker could trick a logged-in user into posting unauthorized reviews or submitting review spam via cross-site requests. Resolved by enforcing Session::checkToken('request') / Session::checkToken('post') in ProductController, injecting HTMLHelper::_('form.token') into the review form template, and appending the session token to the submission payload in review-form.js.

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-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 is a Cross-Site Request Forgery (CSRF) vulnerability in the Easy Store Joomla extension versions 1.0.0 to 3.0.0. The product review submission endpoint lacked CSRF token verification, allowing attackers to trick logged-in users into submitting unauthorized reviews or spam by crafting malicious requests.

Detection Guidance

Check Joomla extensions for Easy Store 1.0.0-3.0.0. Inspect network traffic for POST requests to index.php?option=com_easystore&task=product.addReview without CSRF tokens. Review server logs for unauthorized review submissions.

Impact Analysis

An attacker could exploit this to post fake reviews, manipulate product ratings, or spam reviews on your Joomla site. This could damage your site's credibility, mislead customers, and require manual cleanup of fraudulent content.

Mitigation Strategies

Update Easy Store extension to the latest version where CSRF token verification is enforced. Manually add Session::checkToken checks if no update is available. Ensure review forms include anti-CSRF tokens in templates and JavaScript payloads.

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