# CVE-2023-25811: Persistent Cross site scripting (XSS) in Uptime Kuma

> Attackers can inject persistent scripts via the name parameter in Uptime Kuma, potentially compromising user sessions and data.

- **Severity:** Medium 6.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N`)
- **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:** 21 Feb 2023
- **Updated:** 10 Mar 2025
- **Also known as:** GHSA-553g-fcpf-m3wp

## What is CVE-2023-25811?

CVE-2023-25811 is a medium-severity cross-site scripting vulnerability in louislam uptime-kuma, published on 21 Feb 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Uptime Kuma is a self-hosted monitoring tool. In versions prior to 1.20.0 the Uptime Kuma `name` parameter allows a persistent XSS attack. Users are advised to upgrade. There are no known workarounds for this vulnerability.

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

## Which versions are affected by CVE-2023-25811?

It affects 1 product.


Products: Uptime-Kuma Project Uptime-Kuma.

## How do I fix CVE-2023-25811?

No fix has been published for CVE-2023-25811 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-25811 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-25811 exists.

## Other vulnerabilities in louislam uptime-kuma

- [CVE-2023-36821](https://insights.sbomify.com/CVE-2023-36821/): Uptime Kuma vulnerable to authenticated remote code execution via malicious plugin installation (high 8.8)
- [CVE-2023-36822](https://insights.sbomify.com/CVE-2023-36822/): Uptime Kuma authenticated path traversal via plugin repository name may lead to unavailability or data loss (medium 6.5)
- [CVE-2023-25810](https://insights.sbomify.com/CVE-2023-25810/): Persistent Cross site scripting (XSS) through description in status page in Uptime Kuma (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-25811 and fix it if it is affected.

What it is: CVE-2023-25811 is a medium-severity cross-site scripting vulnerability in louislam uptime-kuma, published on 21 Feb 2023. 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-2023-25811 exists.

Affected product: louislam uptime-kuma. 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-2023-25811/ (Markdown: https://insights.sbomify.com/CVE-2023-25811/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-25811
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-25811
- OSV: https://osv.dev/vulnerability/CVE-2023-25811

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-25811/
Summaries are generated and may contain mistakes; the official description above is the record.