CVE-2023-33758Public exploitNetwork attack vector

Portal script execution via unescaped login fields

Published Jan 25, 2024 · Updated Jun 20, 2025

Stored XSS in Splicecom Maximiser Soft PBX 1.5 and earlier allows remote attackers to execute scripts through crafted login fields. The SSL Gateway stores arbitrary CLIENT_NAME and DEVICE_GUID values, and the PHP management portal renders them without output escaping. A portal user must view an affected management page; the script runs in that user's browser context, and crafted values can also make portal pages and backups inoperable.

CVSS severity6.1
Medium
EPSS probability0.37%
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 Splicecom Maximiser Soft PBX 1.5 and earlier allows remote attackers to execute scripts through crafted login fields. The SSL Gateway stores arbitrary CLIENT_NAME and DEVICE_GUID values, and the PHP management portal renders them without output escaping. A portal user must view an affected management page; the script runs in that user's browser context, and crafted values can also make portal pages and backups inoperable.

The record

CVE
CVE-2023-33758
Published
Jan 25, 2024
Updated
Jun 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 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?

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

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NVDCVSS: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')
T1059.007JavaScript/JScript

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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