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GHSA-g8rh-fjm6-h2h9

LowCVSS 3.7 / 10
Published Sep 9, 2026·Last modified Sep 9, 2026
Affected Components(1)
Go logogithub.com/lf-edge/ekuiper/v2
< 2.4.0
Description

Summary

A Cross-Site Scripting (XSS) vulnerability in external service creation allows an authenticated attacker to inject HTML/script payloads into external service names, which may execute in a user's browser when rendered by administrative web interfaces.

Details

Prior to v2.4.0, external service registration endpoints did not strictly enforce alphanumeric character restrictions on service names. An operator or attacker with API access could register a service using a crafted name containing HTML elements (such as <iframe src="...">). If an administrative web UI rendered the unescaped service name, arbitrary script execution could occur in the context of the user's browser session.

PoC

  1. Create an external service JSON definition with a filename containing an XSS payload, e.g. <iframe src="javascript:alert1337">.json inside a ZIP archive.
  2. In external service creation, upload the ZIP and provide the matching service name: <iframe src="javascript:alert1337">.
  3. Upon service registration, the unescaped name executes when rendered in the UI context.

Impact

Self-XSS / Stored XSS leading to potential session token leakage or unauthorized actions in the context of the affected user's browser session.

Remediation & Patches

  • Upgrade to eKuiper >= 2.4.0: Strict alphanumeric identifier validation (validate.ValidateID) is now enforced on all external service creation and update endpoints, rejecting invalid characters.

Workarounds

  • Protect eKuiper management endpoints (POST /services) with authentication and network-level firewalls.

Credits

  • Reported by Alexey Kosmachev, Bi.Zone (@TheMostKnown)
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Risk Scores
Base Score
3.7

The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs basic access or low-level privileges. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.

Threat Intelligence
3.4

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2025-24978
    Alias

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Low severity
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