CVE-2023-42327Network attack vector

Session compromise via unencoded connection parameter

Published Nov 14, 2023 · Updated Aug 2, 2024

Reflected XSS in Netgate pfSense Plus 23.05.1 and earlier and CE 2.7.0 and earlier allows remote attackers to execute JavaScript. The getserviceproviders.php page displays the user-controlled connection value without consistently validating, sanitizing, or encoding it. A logged-in user with access to that page must follow the crafted URL while the selected provider has only one plan, exposing session data and enabling actions with that user's privileges.

CVSS severity5.4
Medium
EPSS probability55.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Netgate pfSense Plus 23.05.1 and earlier and CE 2.7.0 and earlier allows remote attackers to execute JavaScript. The getserviceproviders.php page displays the user-controlled connection value without consistently validating, sanitizing, or encoding it. A logged-in user with access to that page must follow the crafted URL while the selected provider has only one plan, exposing session data and enabling actions with that user's privileges.

The record

CVE
CVE-2023-42327
Published
Nov 14, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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