CVE-2023-31853Public exploitNetwork attack vector

Administrator session takeover via reflected icon parameter

Published Jul 17, 2023 · Updated Oct 30, 2024

Reflected XSS in Cudy LT400 1.13.4 allows remote attackers to execute script in an administrator's browser via a crafted request. The bandwidth endpoint reflects the icon query parameter into its response without neutralizing injected markup, causing the browser to interpret attacker-supplied script. A logged-in administrator must open the request; the script can read the non-HttpOnly sysauth cookie and enable session takeover.

CVSS severity6.1
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Cudy LT400 1.13.4 allows remote attackers to execute script in an administrator's browser via a crafted request. The bandwidth endpoint reflects the icon query parameter into its response without neutralizing injected markup, causing the browser to interpret attacker-supplied script. A logged-in administrator must open the request; the script can read the non-HttpOnly sysauth cookie and enable session takeover.

The record

CVE
CVE-2023-31853
Published
Jul 17, 2023
Updated
Oct 30, 2024
Vendor
Cudy
Product
LT400
Classifications
CWE-79, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 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=1.13.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cudy · LT400version=1.13.4

Published CVSS scores

6.1NIST NVDCVSS: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.

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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')
T1539Steal Web Session Cookie

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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