# CVE-2024-52300: macro-pdfviewer has a XSS through the width parameter

> Attackers can inject malicious scripts via the width parameter, potentially compromising the entire XWiki installation when an admin views the page.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 13 Nov 2024
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-84wx-6vfp-5m6g

## What is CVE-2024-52300?

CVE-2024-52300 is a critical cross-site scripting vulnerability in xwikisas macro-pdfviewer, published on 13 Nov 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

macro-pdfviewer is a PDF Viewer Macro for XWiki using Mozilla pdf.js. The width parameter of the PDF viewer macro isn't properly escaped, allowing XSS for any user who can edit a page. XSS can impact the confidentiality, integrity and availability of the whole XWiki installation when an admin visits the page with the malicious code. This is fixed in 2.5.6.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page)

## Which versions are affected by CVE-2024-52300?

It affects 1 product.


Products: Xwiki Pdf Viewer Macro.

## How do I fix CVE-2024-52300?

No fix has been published for CVE-2024-52300 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-52300 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-52300 exists.

## Other vulnerabilities in xwikisas macro-pdfviewer

- [CVE-2024-52298](https://insights.sbomify.com/CVE-2024-52298/): macro-pdfviewer's preview in WYSIWYG editor allows accessing any PDF document as the last author (high 7.5)
- [CVE-2024-52299](https://insights.sbomify.com/CVE-2024-52299/): The PDF viewer macro allows accessing any attachment without access right checks (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-52300 and fix it if it is affected.

What it is: CVE-2024-52300 is a critical cross-site scripting vulnerability in xwikisas macro-pdfviewer, published on 13 Nov 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-52300 exists.

Affected product: xwikisas macro-pdfviewer. 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-2024-52300/ (Markdown: https://insights.sbomify.com/CVE-2024-52300/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-52300
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-52300
- OSV: https://osv.dev/vulnerability/CVE-2024-52300

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-52300/
Summaries are generated and may contain mistakes; the official description above is the record.