# CVE-2026-71542: GetSimple CMS: Stored Cross-Site Scripting (XSS) via the "title" parameter in admin/components.php

> Attackers can inject persistent JavaScript into the admin panel via the title parameter, potentially leading to session hijacking or admin account takeover.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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:** 1 Oct 2026
- **Also known as:** GHSA-vqfh-838q-xfqh

## What is CVE-2026-71542?

CVE-2026-71542 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, GetSimpleCMS-CE is vulnerable to stored Cross-Site Scripting (XSS) in the "Theme to Components" functionality (admin/components.php) via the title parameter. The stored title is rendered inside a double-quoted HTML attribute in the administrative interface through an output path that HTML-entity-decodes the value before printing it, without re-encoding for the attribute context. This allows persistent execution of arbitrary JavaScript in the admin 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-2026-71542?


## How do I fix CVE-2026-71542?

No fix has been published for CVE-2026-71542 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-71542 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-71542 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-71542 and fix it if it is affected.

What it is: CVE-2026-71542 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-71542 exists.

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-2026-71542/ (Markdown: https://insights.sbomify.com/CVE-2026-71542/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-71542
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-71542
- OSV: https://osv.dev/vulnerability/CVE-2026-71542

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-71542/
Summaries are generated and may contain mistakes; the official description above is the record.