# CVE-2023-23635: Jellyfin Web Cross-Site Scripting (XSS) via Collection Name

> Stored XSS in Jellyfin collection names allows attackers to steal access tokens from victims' local storage.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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:** Yes
- **Published:** 3 Feb 2023
- **Updated:** 26 Mar 2025
- **Also known as:** GHSA-749c-pc87-4qcw

## What is CVE-2023-23635?

CVE-2023-23635 is a medium-severity cross-site scripting vulnerability in n/a, published on 3 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

In Jellyfin 10.8.x through 10.8.3, the name of a collection is vulnerable to stored XSS. This allows an attacker to steal access tokens from the localStorage of the victim.

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

## Which versions are affected by CVE-2023-23635?

2 open source packages ship an affected version, including jellyfin-web. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `jellyfin-web` | npm | From 10.8.0 | 10.8.4 |
| `jellyfin-web` | npm | From 10.8.0 | 10.8.4 |

Products: Jellyfin Jellyfin.

## How do I fix CVE-2023-23635?

Upgrade jellyfin-web to 10.8.4 or later.

## Is CVE-2023-23635 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-23635 exists.

## Other vulnerabilities in n/a

- [CVE-2026-35031](https://insights.sbomify.com/CVE-2026-35031/): Jellyfin: Potential RCE via subtitle upload path traversal + .strm chain (critical 10.0)
- [CVE-2026-31852](https://insights.sbomify.com/CVE-2026-31852/): Jellyfin Possible Organization/Secret Compromise from dangerous CI implementation (critical 10.0)
- [CVE-2026-35033](https://insights.sbomify.com/CVE-2026-35033/): Jellyfin: Potential SSRF + Arbitrary file read via stream argument injection (critical 9.3)
- [CVE-2023-30627](https://insights.sbomify.com/CVE-2023-30627/): jellyfin-web has a stored cross-site scripting vulnerability in devices.js (critical 9.1)
- [CVE-2023-30626](https://insights.sbomify.com/CVE-2023-30626/): Jellyfin vulnerable to directory traversal and file write causing arbitrary code execution (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23635 and fix it if it is affected.

What it is: CVE-2023-23635 is a medium-severity cross-site scripting vulnerability in n/a, published on 3 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-2023-23635 exists.

Affected packages and fixed versions:
- jellyfin-web (npm): affected from 10.8.0; fixed in 10.8.4
- jellyfin-web (npm): affected from 10.8.0; fixed in 10.8.4

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-2023-23635/ (Markdown: https://insights.sbomify.com/CVE-2023-23635/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23635
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23635
- OSV: https://osv.dev/vulnerability/CVE-2023-23635

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23635/
Summaries are generated and may contain mistakes; the official description above is the record.