CVE-2023-5421Network attack vector

Stored XSS via manipulated CustomerID field

Published Oct 16, 2023 · Updated Sep 16, 2024

Stored XSS in the OTRS Agent Interface before 7.0.47 or 8.0.37 allows remote authenticated users to run JavaScript through a CustomerID value. The interface saves a JavaScript-bearing CustomerID and renders the stored value without neutralizing executable content; Community Edition 6.0.34 and earlier is also affected. Exploitation requires permission to create or change customer-user data and a changed AdminCustomerUser::UseAutoComplete setting, which is disabled by default.

CVSS severity5.5
Medium
EPSS probability0.37%
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 OTRS Agent Interface before 7.0.47 or 8.0.37 allows remote authenticated users to run JavaScript through a CustomerID value. The interface saves a JavaScript-bearing CustomerID and renders the stored value without neutralizing executable content; Community Edition 6.0.34 and earlier is also affected. Exploitation requires permission to create or change customer-user data and a changed AdminCustomerUser::UseAutoComplete setting, which is disabled by default.

The record

CVE
CVE-2023-5421
Published
Oct 16, 2023
Updated
Sep 16, 2024
Vendor
Centuran Consulting
Product
OTRS Community Edition
Classifications
CWE-79, CWE-20, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=6.0.x <=6.0.34

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Centuran Consulting · OTRS Community Editionversion=6.0.x <=6.0.34
Centuran Consulting · OTRSversion=7.0.x <7.0.47; version=8.0.x <8.0.37

Published CVSS scores

3.5OTRS AGCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
5.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/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.

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')
CWE-20Improper Input Validation
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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