CVE-2024-3378Public exploitNetwork attack vector

Stored script execution via persisted redirectUrl

Published Apr 6, 2024 · Updated Aug 1, 2024

Stored XSS in iboss Secure Web Gateway 10.1 and earlier allows remote attackers to run script in login-page visitors' browsers via redirectUrl. The /user_login_submit handler stores an unescaped redirectUrl value from a failed login and inserts it into later /login responses. No valid credentials are required, but a visitor must load the login page; the injected script then runs in that site's browser context.

CVSS severity4.3
Medium
EPSS probability22.00%
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 iboss Secure Web Gateway 10.1 and earlier allows remote attackers to run script in login-page visitors' browsers via redirectUrl. The /user_login_submit handler stores an unescaped redirectUrl value from a failed login and inserts it into later /login responses. No valid credentials are required, but a visitor must load the login page; the injected script then runs in that site's browser context.

The record

CVE
CVE-2024-3378
Published
Apr 6, 2024
Updated
Aug 1, 2024
Vendor
iboss
Product
iboss Secure Web Gateway
Classifications
CWE-79, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

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

  1. Affected versionversion=10.0
  2. Affected versionversion=10.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

iboss · iboss Secure Web Gatewayversion=10.0; version=10.1

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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.

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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')
T1190Exploit Public-Facing Application

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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