# CVE-2026-63281: Joomla Extension - regularlabs.com - XSS vulnerability in Regular Labs conditions manager

> Stored XSS in Regular Labs Joomla extensions allows attackers to execute scripts in administrator summaries, potentially compromising admin accounts.

- **Severity:** Medium 4.8 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 22 Jul 2026
- **Updated:** 27 Jul 2026
- **Also known as:** GHSA-h333-v96h-jwmm

## What is CVE-2026-63281?

CVE-2026-63281 is a medium-severity cross-site scripting vulnerability in regularlabs.com Advanced Module Manager extension for Joomla, published on 22 Jul 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Joomla Extension - regularlabs.com - XSS vulnerability in Regular Labs conditions manager - Stored condition values could also execute HTML/JavaScript in administrator summaries.

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

## Which versions are affected by CVE-2026-63281?


## How do I fix CVE-2026-63281?

No fix has been published for CVE-2026-63281 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-63281 being exploited?

There is no known exploitation of CVE-2026-63281 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-63281 and fix it if it is affected.

What it is: CVE-2026-63281 is a medium-severity cross-site scripting vulnerability in regularlabs.com Advanced Module Manager extension for Joomla, published on 22 Jul 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-63281 in the wild and no public exploit code.

Affected product: regularlabs.com Advanced Module Manager 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-2026-63281/ (Markdown: https://insights.sbomify.com/CVE-2026-63281/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-63281
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-63281
- OSV: https://osv.dev/vulnerability/CVE-2026-63281

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-63281/
Summaries are generated and may contain mistakes; the official description above is the record.