CVE-2023-23636: Jellyfin web Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-2h5r-cqfc-45v6
Share
CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2023-23636 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Jellyfin web libraries in the npm ecosystem. The issue involves jellyfin web cross-site scripting (xss) via playlist name. Remediation is available by upgrading affected packages to version 10.8.4.

CVE-2023-23636 at a Glance

CVE Identifier CVE-2023-23636
GHSA Identifier GHSA-2h5r-cqfc-45v6
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Jellyfin web
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2023-23636

To remediate this vulnerability, upgrade all affected Jellyfin web dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

jellyfin-web fixed: 10.8.4 
npm install jellyfin-web@10.8.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls jellyfin-web

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-23636, inspect your project dependencies using npm:

npm ls jellyfin-web

Analyze the terminal output to locate any version of Jellyfin web in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.8.4), your application is affected.

Note: The npm ls jellyfin-web command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Jellyfin web, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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

CVE-2023-23636 Affected Jellyfin web Versions

1 component(s)
Fixed Versions:
10.8.4
Product / Package Ecosystem Affected Versions Fixed Version
jellyfin-web
npm/jellyfin-web
npm
≥ 10.8.0
< 10.8.4
10.8.4

References

NVD — CVE-2023-23636 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-23636
Jellyfin web Source Repository REPOSITORY
https://github.com/jellyfin/jellyfin-web/issues/3788
Jellyfin web Source Repository REPOSITORY
https://github.com/jellyfin/jellyfin-web/pull/3789
Jellyfin web Source Repository REPOSITORY
https://github.com/jellyfin/jellyfin-web
Jellyfin web Release RELEASE
https://github.com/jellyfin/jellyfin/releases/tag/v10.8.4
Jellyfin web Security Information SECURITY
https://herolab.usd.de/security-advisories
Jellyfin web Security Information SECURITY
https://herolab.usd.de/security-advisories/usd-2022-0030

Frequently Asked Questions

What is CVE-2023-23636?
CVE-2023-23636 is a security vulnerability in Jellyfin web involving Jellyfin Web Cross-Site Scripting (XSS) via Playlist Name under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Jellyfin web versions are affected?
Affected versions include releases prior to 10.8.4 across affected packages: jellyfin-web.
What version fixes CVE-2023-23636?
Upgrading to 10.8.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is jellyfin-web affected?
Yes, jellyfin-web is affected in releases prior to 10.8.4. Upgrade your dependency to 10.8.4 or later.
What is the CVSS score of CVE-2023-23636?
CVE-2023-23636 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2023-23636?
CVE-2023-23636 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2023-23636?
Run the dependency tree command: 'npm ls jellyfin-web'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2h5r-cqfc-45v6",
  "modified" : "2025-03-27T21:18:22Z",
  "published" : "2023-02-03T03:30:25Z",
  "aliases" : [ "CVE-2023-23636" ],
  "summary" : "Jellyfin Web Cross-Site Scripting (XSS) via Playlist Name",
  "details" : "In Jellyfin 10.8.x through 10.8.3, the name of a playlist is vulnerable to stored XSS. This allows an attacker to steal access tokens from the localStorage of the victim.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "jellyfin-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.8.0"
      }, {
        "fixed" : "10.8.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-23636"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jellyfin/jellyfin-web/issues/3788"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jellyfin/jellyfin-web/pull/3789"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/jellyfin/jellyfin-web"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jellyfin/jellyfin/releases/tag/v10.8.4"
  }, {
    "type" : "WEB",
    "url" : "https://herolab.usd.de/security-advisories"
  }, {
    "type" : "WEB",
    "url" : "https://herolab.usd.de/security-advisories/usd-2022-0030"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-27T21:18:22Z",
    "nvd_published_at" : "2023-02-03T01:15:00Z"
  }
}