CVE-2023-39007Known exploitationPublic exploitNetwork attack vector

Script execution via unescaped Cron UUID

Published Aug 9, 2023 · Updated Oct 10, 2024

Reflected XSS in OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows remote attackers to run scripts. ItemController.php's openAction assigns the URL-supplied UUID directly to selected_uuid, allowing it to enter the Cron view's JavaScript without HTML encoding. An administrator must open a crafted link; the script then runs in the OPNsense origin and can issue requests with that session's privileges.

CVSS severity9.6
Critical
EPSS probability2.61%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows remote attackers to run scripts. ItemController.php's openAction assigns the URL-supplied UUID directly to selected_uuid, allowing it to enter the Cron view's JavaScript without HTML encoding. An administrator must open a crafted link; the script then runs in the OPNsense origin and can issue requests with that session's privileges.

The record

CVE
CVE-2023-39007
Published
Aug 9, 2023
Updated
Oct 10, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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

9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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.

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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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

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

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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