# CVE-2026-90905: Cross-site request forgery in Easy Store extension for Joomla

> Attackers can modify site email configuration via CSRF due to missing token validation and access control in the Easy Store extension.

- **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:H/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-3x8p-4xmj-7ppp

## What is CVE-2026-90905?

CVE-2026-90905 is a high-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 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().

Weakness: CWE-352 (Cross-Site Request Forgery), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-90905?


## How do I fix CVE-2026-90905?

No fix has been published for CVE-2026-90905 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90905 being exploited?

There is no known exploitation of CVE-2026-90905 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90905 and fix it if it is affected.

What it is: CVE-2026-90905 is a high-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-2026-90905 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-2026-90905/ (Markdown: https://insights.sbomify.com/CVE-2026-90905/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90905
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90905
- OSV: https://osv.dev/vulnerability/CVE-2026-90905

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90905/
Summaries are generated and may contain mistakes; the official description above is the record.