# CVE-2026-100182: Download Monitor <= 5.2.10 - Unauthenticated Stored Cross-Site Scripting via Cross-Origin postMessage to Admin Editor

> Unauthenticated attackers can inject scripts via postMessage to admin editors, leading to stored XSS and potential account takeover when admins visit malicious pages.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Oct 2026
- **Updated:** 2 Oct 2026
- **Also known as:** GHSA-377g-82j6-34xp

## What is CVE-2026-100182?

CVE-2026-100182 is a high-severity cross-site scripting vulnerability in wpchill Download Monitor, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Download Monitor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Cross-Origin postMessage to Admin Editor in all versions up to, and including, 5.2.10 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to trick an authenticated Administrator into visiting an attacker-controlled page that targets an open Download edit screen, after which the payload is persisted unfiltered via the Administrator's unfiltered_html capability and later emitted verbatim to the frontend by the [download_data] shortcode's unescaped post_content render path.

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

## Which versions are affected by CVE-2026-100182?


## How do I fix CVE-2026-100182?

No fix has been published for CVE-2026-100182 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-100182 being exploited?

There is no known exploitation of CVE-2026-100182 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100182 and fix it if it is affected.

What it is: CVE-2026-100182 is a high-severity cross-site scripting vulnerability in wpchill Download Monitor, published on 2 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-2026-100182 in the wild and no public exploit code.

Affected product: wpchill Download Monitor. 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-2026-100182/ (Markdown: https://insights.sbomify.com/CVE-2026-100182/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100182
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100182
- OSV: https://osv.dev/vulnerability/CVE-2026-100182

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100182/
Summaries are generated and may contain mistakes; the official description above is the record.