# CVE-2026-90900: Cross-site request forgery in Easy Store extension for Joomla

> Attackers can trick logged-in users into submitting unauthorized product reviews or spam in the Easy Store Joomla extension due to missing CSRF token verification.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Sep 2026
- **Updated:** 23 Sep 2026
- **Also known as:** GHSA-rf4v-mqxp-593r

## What is CVE-2026-90900?

CVE-2026-90900 is a medium-severity vulnerability in joomshaper.com Easy Store extension for Joomla, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-90900?


## How do I fix CVE-2026-90900?

No fix has been published for CVE-2026-90900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90900 being exploited?

There is no known exploitation of CVE-2026-90900 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90900 and fix it if it is affected.

What it is: CVE-2026-90900 is a medium-severity vulnerability in joomshaper.com Easy Store extension for Joomla, published on 23 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-90900 in the wild and no public exploit code.

Affected product: joomshaper.com Easy Store extension for Joomla. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-90900/ (Markdown: https://insights.sbomify.com/CVE-2026-90900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90900
- OSV: https://osv.dev/vulnerability/CVE-2026-90900

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90900/
Summaries are generated and may contain mistakes; the official description above is the record.