# CVE-2018-8891: Cross-site scripting in BlackBerry UEM

> Stored XSS in BlackBerry UEM Management Console allows attackers to execute scripts in the context of administrators, potentially leading to account takeover.

- **Severity:** Medium 4.8 (`CVSS:3.0/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:** 20 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-3hqc-2q4g-6wf5

## What is CVE-2018-8891?

CVE-2018-8891 is a medium-severity cross-site scripting vulnerability in BlackBerry UEM, published on 20 Dec 2018. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Multiple stored cross-site scripting (XSS) vulnerabilities in the Management Console of BlackBerry UEM versions earlier than 12.9.1 could allow an attacker to store script commands that could later be executed in the context of another Management Console administrator.

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

## Which versions are affected by CVE-2018-8891?

It affects 1 product.


Products: Blackberry Unified Endpoint Manager.

## How do I fix CVE-2018-8891?

No fix has been published for CVE-2018-8891 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-8891 being exploited?

There is no known exploitation of CVE-2018-8891 in the wild and no public exploit code.

## Other vulnerabilities in BlackBerry UEM

- [CVE-2026-18084](https://insights.sbomify.com/CVE-2026-18084/): Cross-Site Scripting (XSS) in Management Console of BlackBerry UEM (high 8.6)
- [CVE-2018-8890](https://insights.sbomify.com/CVE-2018-8890/): Information disclosure in UEM (high 7.5)
- [CVE-2018-8892](https://insights.sbomify.com/CVE-2018-8892/): Cross-site request forgery in BlackBerry UEM (medium 6.5)
- [CVE-2017-17442](https://insights.sbomify.com/CVE-2017-17442/): Cross-site scripting in UEM Management Console (medium 6.1)
- [CVE-2026-18085](https://insights.sbomify.com/CVE-2026-18085/): Improper Input Validation Leads to Arbitrary File Download and Potential Denial of Service in BlackBerry UEM (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-8891 and fix it if it is affected.

What it is: CVE-2018-8891 is a medium-severity cross-site scripting vulnerability in BlackBerry UEM, published on 20 Dec 2018. 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-2018-8891 in the wild and no public exploit code.

Affected product: BlackBerry UEM. 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-2018-8891/ (Markdown: https://insights.sbomify.com/CVE-2018-8891/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-8891
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-8891
- OSV: https://osv.dev/vulnerability/CVE-2018-8891

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-8891/
Summaries are generated and may contain mistakes; the official description above is the record.