CVE-2023-39006Public exploit

Stored XSS via unescaped crash-report content

Published Aug 9, 2023 · Updated Oct 10, 2024

Stored XSS in OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows local users to execute script in an admin browser. crash_reporter.php reads /tmp/PHP_errors.log and inserts its contents directly inside a pre element without HTML encoding. A local user who can write the log must wait for an authenticated administrator to open Crash Reporter; the injected script then runs with the web interface's origin.

CVSS severity5.4
Medium
EPSS probability0.48%
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 OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows local users to execute script in an admin browser. crash_reporter.php reads /tmp/PHP_errors.log and inserts its contents directly inside a pre element without HTML encoding. A local user who can write the log must wait for an authenticated administrator to open Crash Reporter; the injected script then runs with the web interface's origin.

The record

CVE
CVE-2023-39006
Published
Aug 9, 2023
Updated
Oct 10, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
local
Privileges
authenticated

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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6LogicalTrustCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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