# CVE-2026-5108: Cross-site scripting in Super Progressive Web Apps

> Administrators can inject arbitrary scripts via the offline message setting, leading to stored XSS execution for users triggering the offline snackbar.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 5 Aug 2026
- **Updated:** 5 Aug 2026
- **Also known as:** GHSA-p46p-m4cq-5fh8

## What is CVE-2026-5108?

CVE-2026-5108 is a medium-severity cross-site scripting vulnerability in superpwa Super Progressive Web Apps, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The Super Progressive Web Apps plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `superpwa_settings[offline_message_txt]` setting in all versions up to, and including, 2.2.43. This is due to insufficient input sanitization and output escaping. The offline message value is stored without sanitization, passed to the frontend via `wp_localize_script()` without escaping, and rendered using `innerHTML` in the JavaScript snackbar component. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user triggers the offline snackbar.

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

## Which versions are affected by CVE-2026-5108?


## How do I fix CVE-2026-5108?

No fix has been published for CVE-2026-5108 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5108 being exploited?

There is no known exploitation of CVE-2026-5108 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5108 and fix it if it is affected.

What it is: CVE-2026-5108 is a medium-severity cross-site scripting vulnerability in superpwa Super Progressive Web Apps, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-5108 in the wild and no public exploit code.

Affected product: superpwa Super Progressive Web Apps. 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-2026-5108/ (Markdown: https://insights.sbomify.com/CVE-2026-5108/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5108
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5108
- OSV: https://osv.dev/vulnerability/CVE-2026-5108

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5108/
Summaries are generated and may contain mistakes; the official description above is the record.