CVE-2024-3911Network attack vector

Unintended actions via unrestricted WebUI framing

Published Apr 23, 2024 · Updated Aug 27, 2025

Clickjacking in the Welotec SMART EMS and VPN Security Suite WebUIs before 3.1.4 allows remote attackers to trigger unintended actions. The WebUIs allow untrusted sites to render application pages inside deceptive frames without enforcing browser-based framing restrictions. Exploitation requires a targeted user with an active session to visit an attacker-controlled page and interact with disguised interface elements.

CVSS severity6.5
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Clickjacking in the Welotec SMART EMS and VPN Security Suite WebUIs before 3.1.4 allows remote attackers to trigger unintended actions. The WebUIs allow untrusted sites to render application pages inside deceptive frames without enforcing browser-based framing restrictions. Exploitation requires a targeted user with an active session to visit an attacker-controlled page and interact with disguised interface elements.

The record

CVE
CVE-2024-3911
Published
Apr 23, 2024
Updated
Aug 27, 2025
Vendor
Welotec
Product
SMART EMS
Classifications
CWE-1021, CAPEC-103, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <3.1.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Welotec · SMART EMSversion=0 <3.1.4
Welotec · VPN Security Suiteversion=0 <3.1.4

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.5CERT@VDECVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1021Improper Restriction of Rendered UI Layers or Frames
CAPEC-103Clickjacking
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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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