CVE-2024-4175Network attack vector

Cross-site scripting via unescaped Unicode error messages

Published Apr 25, 2024 · Updated Aug 1, 2024

Cross-site scripting in Hyperion Web Server 2.0.15 allows remote attackers to execute JavaScript in a user's browser via a crafted URL. StaticFileServing::printErrorToReply converts an attacker-controlled error message with toLocal8Bit and inserts it into an HTML response without escaping, allowing transformed Unicode characters to become ASCII markup. Exploitation requires a user to open the crafted URL; script execution is confined to that user's browser context and can read or alter page data.

CVSS severity5.4
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Hyperion Web Server 2.0.15 allows remote attackers to execute JavaScript in a user's browser via a crafted URL. StaticFileServing::printErrorToReply converts an attacker-controlled error message with toLocal8Bit and inserts it into an HTML response without escaping, allowing transformed Unicode characters to become ASCII markup. Exploitation requires a user to open the crafted URL; script execution is confined to that user's browser context and can read or alter page data.

The record

CVE
CVE-2024-4175
Published
Apr 25, 2024
Updated
Aug 1, 2024
Vendor
Hyperion Project
Product
Hyperion Web Server
Classifications
CWE-20, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 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=2.0.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hyperion Project · Hyperion Web Serverversion=2.0.15

Published CVSS scores

5.4INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1189Drive-by Compromise

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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