# CVE-2026-70650: Cross-site scripting in GetSimpleCMS-CE

> Authenticated attackers can inject malicious scripts into page metadata that execute in administrators' browsers when viewing backups, potentially leading to account takeover.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/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:** Not needed
- **Fix available:** No
- **Published:** 1 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-p6vf-2xr7-mcf4

## What is CVE-2026-70650?

CVE-2026-70650 is a high-severity cross-site scripting vulnerability in GetSimpleCMS-CE, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. In versions 3.3.22 and prior, an authenticated stored Cross-Site Scripting (XSS) vulnerability exists in the page backup viewer (admin/backup-edit.php). Page fields are correctly HTML-encoded when a page is saved, but the backup viewer decodes them again (htmldecode() / strip_decode()) and prints the result without re-escaping. A user who can edit a page can store JavaScript in a page's Keywords, Description, Menu text or Content; it executes in the browser of any administrator who later views that page's backup, in the context of the admin control panel. At time of publication, there are no publicly available patches.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-70650?


## How do I fix CVE-2026-70650?

No fix has been published for CVE-2026-70650 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-70650 being exploited?

There is no known exploitation of CVE-2026-70650 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-70650 and fix it if it is affected.

What it is: CVE-2026-70650 is a high-severity cross-site scripting vulnerability in GetSimpleCMS-CE, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-70650 in the wild and no public exploit code.

Affected product: GetSimpleCMS-CE. 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-2026-70650/ (Markdown: https://insights.sbomify.com/CVE-2026-70650/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-70650
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-70650
- OSV: https://osv.dev/vulnerability/CVE-2026-70650

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-70650/
Summaries are generated and may contain mistakes; the official description above is the record.