CVE-2025-34182Network attack vector

Stored XSS via unescaped PPP identifier

Published Oct 1, 2025 · Updated May 15, 2026

Stored XSS in the PPP device editor in Deciso OPNsense before 25.7.4 allows remote authenticated users to execute browser script. The ptpid parameter is stored as a form-data key, but legacy_html_escape_form_data() escapes only values, so interfaces_assign.php renders the key as HTML. Interfaces: PPPs: Edit permission is required to plant the value, and execution occurs when another authenticated user opens interface assignment.

CVSS severity5.1
Medium
EPSS probability0.33%
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 the PPP device editor in Deciso OPNsense before 25.7.4 allows remote authenticated users to execute browser script. The ptpid parameter is stored as a form-data key, but legacy_html_escape_form_data() escapes only values, so interfaces_assign.php renders the key as HTML. Interfaces: PPPs: Edit permission is required to plant the value, and execution occurs when another authenticated user opens interface assignment.

The record

CVE
CVE-2025-34182
Published
Oct 1, 2025
Updated
May 15, 2026
Vendor
Deciso B.V.
Product
OPNsense
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <25.7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Deciso B.V. · OPNsenseversion=0 <25.7.4

Published CVSS scores

5.1VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA: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')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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