# CVE-2026-88852: Cross-site scripting in Snippets (Free) extension for Joomla

> A lower-privileged author can inject malicious scripts via the url option in Joomla Snippets extensions, potentially compromising trusted users.

- **Severity:** High 7.5 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/S:N/AU:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-h9wr-65g5-jgq7

## What is CVE-2026-88852?

CVE-2026-88852 is a high-severity cross-site scripting vulnerability in regularlabs.com Snippets (Free) extension for Joomla, published on 14 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Joomla Extension - regularlabs.com - Privileged stored XSS via url option in Snippets Free extension for Joomla < 7.0.0, Snippets Pro extension for Joomla < 11.0.0 - Snippets substitutes variable values supplied by an article tag into saved Snippet content. The affected versions do not consider the article author's trust level. A lower-privileged author can therefore place an unsafe value into a security-sensitive position chosen by the trusted Snippet author.

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

## Which versions are affected by CVE-2026-88852?


## How do I fix CVE-2026-88852?

No fix has been published for CVE-2026-88852 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-88852 being exploited?

There is no known exploitation of CVE-2026-88852 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-88852 and fix it if it is affected.

What it is: CVE-2026-88852 is a high-severity cross-site scripting vulnerability in regularlabs.com Snippets (Free) extension for Joomla, published on 14 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-88852 in the wild and no public exploit code.

Affected product: regularlabs.com Snippets (Free) 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-2026-88852/ (Markdown: https://insights.sbomify.com/CVE-2026-88852/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-88852
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-88852
- OSV: https://osv.dev/vulnerability/CVE-2026-88852

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-88852/
Summaries are generated and may contain mistakes; the official description above is the record.