CVE-2024-27287Public exploitNetwork attack vector

Session hijacking via executable configuration responses

Published Mar 6, 2024 · Updated Aug 26, 2024

Stored XSS in ESPHome 2023.12.9 through 2024.2.1 allows remote authenticated users to execute scripts through the dashboard. The /edit GET handler returns attacker-written configuration content as text/html instead of a non-executable YAML media type. Exploitation requires an authenticated user to store JavaScript and a logged-in victim to open the crafted configuration, exposing session cookies and dashboard actions.

CVSS severity6.5
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ESPHome 2023.12.9 through 2024.2.1 allows remote authenticated users to execute scripts through the dashboard. The /edit GET handler returns attacker-written configuration content as text/html instead of a non-executable YAML media type. Exploitation requires an authenticated user to store JavaScript and a logged-in victim to open the crafted configuration, exposing session cookies and dashboard actions.

The record

CVE
CVE-2024-27287
Published
Mar 6, 2024
Updated
Aug 26, 2024
Vendor
ESPHome
Product
ESPHome
Classifications
CWE-79, T1539
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2023.12.9, < 2024.2.2
  2. Affected versionversion=2023.12.9 <2024.2.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ESPHome · ESPHomeversion=>= 2023.12.9, < 2024.2.2; version=2023.12.9 <2024.2.2

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
8.7NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1539Steal Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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