CVE-2025-34318Public exploitNetwork attack vector

Stored XSS via unencoded proxy configuration fields

Published Oct 28, 2025 · Updated Oct 28, 2025

Stored XSS in /cgi-bin/proxy.cgi in IPFire before 2.29 allows remote authenticated users to execute JavaScript in other users' browsers. The CGI stores TLS_HOSTNAME, UPSTREAM_USER, UPSTREAM_PASSWORD, ADMIN_MAIL_ADDRESS, and ADMIN_PASSWORD values and later renders them without HTML sanitization or encoding. Access to the management interface and a second user viewing the affected proxy configuration are required, exposing that user's browser session to attacker-controlled script.

CVSS severity5.1
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 /cgi-bin/proxy.cgi in IPFire before 2.29 allows remote authenticated users to execute JavaScript in other users' browsers. The CGI stores TLS_HOSTNAME, UPSTREAM_USER, UPSTREAM_PASSWORD, ADMIN_MAIL_ADDRESS, and ADMIN_PASSWORD values and later renders them without HTML sanitization or encoding. Access to the management interface and a second user viewing the affected proxy configuration are required, exposing that user's browser session to attacker-controlled script.

The record

CVE
CVE-2025-34318
Published
Oct 28, 2025
Updated
Oct 28, 2025
Vendor
IPFire Project
Product
IPFire
Classifications
CWE-79, CAPEC-592, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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?

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

  1. Affected versionversion=0 <2.29 (Core Update 198)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IPFire Project · IPFireversion=0 <2.29 (Core Update 198)

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
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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