CVE-2023-49276: Uptime kuma Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-v4v2-8h88-65qj
Share
CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2023-49276 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Uptime kuma libraries in the npm ecosystem. The issue involves attribute injection leading to xss(cross-site-scripting). Remediation is available by upgrading affected packages to version 1.23.7.

CVE-2023-49276 at a Glance

CVE Identifier CVE-2023-49276
GHSA Identifier GHSA-v4v2-8h88-65qj
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Uptime kuma
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2023-49276

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

uptime-kuma fixed: 1.23.7 
npm install uptime-kuma@1.23.7
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 uptime-kuma

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-49276, inspect your project dependencies using npm:

npm ls uptime-kuma

Analyze the terminal output to locate any version of Uptime kuma in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.23.7), your application is affected.

Note: The npm ls uptime-kuma 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 Uptime kuma, 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

### Summary Google Analytics element Attribute Injection leading to XSS ### Details Since the custom status interface can set an independent Google Analytics ID and the template has not been sanitized, there is an attribute injection vulnerability here, which can lead to XSS attacks. ![image](https://user-images.githubusercontent.com/110759348/282278047-667b774b-421f-449a-8f95-3f3906ae4216.png) ### PoC 1. Run the latest version of the louislam/uptime-kuma container and initialize the account password. 2. Create a new status page. 3. Edit the status page and change the Google Analytics ID to following payload(it only works for firefox. Any attribute can be injected, but this seems the most intuitive): ``` 123123" onafterscriptexecute=alert(window.name+1),eval(window.name) a="x ``` 4. Click Save and return to the interface. XSS occurs. screenshots: ![image](https://user-images.githubusercontent.com/110759348/282287393-4874974f-9416-4941-9c2e-a92ee2412197.png) ![9d0603e634fb7da2e83a0a45dc0a36ac](https://user-images.githubusercontent.com/110759348/282287346-1deb0382-520f-47cf-b191-9b7d19c47879.png)

CVE-2023-49276 Affected Uptime kuma Versions

1 component(s)
Fixed Versions:
1.23.7
Product / Package Ecosystem Affected Versions Fixed Version
uptime-kuma
npm/uptime-kuma
npm
≥ 1.20.0
< 1.23.7
1.23.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/louislam/uptime-kuma/security/advisories/GHSA-v4v2-8h88-65qj
NVD — CVE-2023-49276 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-49276
Security Fix Commit FIX COMMIT
https://github.com/louislam/uptime-kuma/commit/f28dccf4e11f041564293e4f407e69ab9ee2277f
Uptime kuma Source Repository REPOSITORY
https://github.com/louislam/uptime-kuma

Frequently Asked Questions

What is CVE-2023-49276?
CVE-2023-49276 is a security vulnerability in Uptime kuma involving Attribute Injection leading to XSS(Cross-Site-Scripting) under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Uptime kuma versions are affected?
Affected versions include releases prior to 1.23.7 across affected packages: uptime-kuma.
What version fixes CVE-2023-49276?
Upgrading to 1.23.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is uptime-kuma affected?
Yes, uptime-kuma is affected in releases prior to 1.23.7. Upgrade your dependency to 1.23.7 or later.
What is the CVSS score of CVE-2023-49276?
CVE-2023-49276 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2023-49276?
CVE-2023-49276 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-2023-49276?
Run the dependency tree command: 'npm ls uptime-kuma'. 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-v4v2-8h88-65qj",
  "modified" : "2023-12-07T22:59:07Z",
  "published" : "2023-11-24T16:54:20Z",
  "aliases" : [ "CVE-2023-49276" ],
  "summary" : "Attribute Injection leading to XSS(Cross-Site-Scripting)",
  "details" : "### Summary\nGoogle Analytics element Attribute Injection leading to XSS\n\n### Details\nSince the custom status interface can set an independent Google Analytics ID and the template has not been sanitized, there is an attribute injection vulnerability here, which can lead to XSS attacks.\n![image](https://user-images.githubusercontent.com/110759348/282278047-667b774b-421f-449a-8f95-3f3906ae4216.png)\n\n### PoC\n1. Run the latest version of the louislam/uptime-kuma container and initialize the account password.\n2. Create a new status page.\n3. Edit the status page and change the Google Analytics ID to following payload(it only works for firefox. Any attribute can be injected, but this seems the most intuitive):\n```\n123123\" onafterscriptexecute=alert(window.name+1),eval(window.name) a=\"x\n```\n\n4. Click Save and return to the interface. XSS occurs.\nscreenshots:\n![image](https://user-images.githubusercontent.com/110759348/282287393-4874974f-9416-4941-9c2e-a92ee2412197.png)\n\n![9d0603e634fb7da2e83a0a45dc0a36ac](https://user-images.githubusercontent.com/110759348/282287346-1deb0382-520f-47cf-b191-9b7d19c47879.png)\n\n\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "uptime-kuma"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.20.0"
      }, {
        "fixed" : "1.23.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.23.6"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/louislam/uptime-kuma/security/advisories/GHSA-v4v2-8h88-65qj"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-49276"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/louislam/uptime-kuma/commit/f28dccf4e11f041564293e4f407e69ab9ee2277f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/louislam/uptime-kuma"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-24T16:54:20Z",
    "nvd_published_at" : "2023-12-01T22:15:10Z"
  }
}