CVE-2023-38308Public exploitNetwork attack vector

Browser script execution via tunneled third-party URL

Published Jul 31, 2023 · Updated Oct 22, 2024

Cross-site scripting in Webmin 2.021 HTTP Tunnel allows remote attackers to execute JavaScript through a crafted third-party URL. The HTTP Tunnel feature opens content from a supplied third-party URL in the Webmin browser context rather than isolating its active code. Exploitation requires a Webmin user to enter and open the attacker-controlled URL, after which script execution can expose or alter browser-accessible data in that Webmin session.

CVSS severity6.1
Medium
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Webmin 2.021 HTTP Tunnel allows remote attackers to execute JavaScript through a crafted third-party URL. The HTTP Tunnel feature opens content from a supplied third-party URL in the Webmin browser context rather than isolating its active code. Exploitation requires a Webmin user to enter and open the attacker-controlled URL, after which script execution can expose or alter browser-accessible data in that Webmin session.

The record

CVE
CVE-2023-38308
Published
Jul 31, 2023
Updated
Oct 22, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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