CVE-2024-27287

2024-03-0619:15:07

CWE-79

[email protected]

web.nvd.nist.gov

esphome

cve-2024-27287

cross-site scripting

home automation

security vulnerability

api security

xss

esp8266

esp32

nvd

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

6.1 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

9.0%

JSON

ESPHome is a system to control your ESP8266/ESP32 for Home Automation systems. Starting in version 2023.12.9 and prior to version 2024.2.2, editing the configuration file API in dashboard component of ESPHome version 2023.12.9 (command line installation and Home Assistant add-on) serves unsanitized data with Content-Type: text/html; charset=UTF-8, allowing a remote authenticated user to inject arbitrary web script and exfiltrate session cookies via Cross-Site scripting. It is possible for a malicious authenticated user to inject arbitrary Javascript in configuration files using a POST request to the /edit endpoint, the configuration parameter allows to specify the file to write. To trigger the XSS vulnerability, the victim must visit the page /edit?configuration=[xss file]. Abusing this vulnerability a malicious actor could perform operations on the dashboard on the behalf of a logged user, access sensitive information, create, edit and delete configuration files and flash firmware on managed boards.
In addition to this, cookies are not correctly secured, allowing the exfiltration of session cookie values. Version 2024.2.2 contains a patch for this issue.

Affected configurations

Vulners

Node

esphomeesphome_firmwareRange2023.12.9–2024.2.2

VendorProductVersionCPE
esphomeesphome_firmware*cpe:2.3:o:esphome:esphome_firmware:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
esphome	esphome_firmware	*	cpe:2.3:o:esphome:esphome_firmware::::::::

CNA Affected

[
  {
    "vendor": "esphome",
    "product": "esphome",
    "versions": [
      {
        "version": ">= 2023.12.9, < 2024.2.2",
        "status": "affected"
      }
    ]
  }
]