CVE-2022-4271Network attack vector

Agent-browser script execution via unsanitized usernames

Published Dec 2, 2022 · Updated Apr 14, 2025

Cross-site scripting in osTicket before 1.16.4 allows remote authenticated users to execute script in an agent's browser via a username. User update and registration paths store username input without sanitization, and staff templates render it without HTML escaping. A user account and an agent who opens the User Lookup AJAX response are required; the script runs with the agent's browser privileges.

CVSS severity8.0
High
EPSS probability0.69%
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 osTicket before 1.16.4 allows remote authenticated users to execute script in an agent's browser via a username. User update and registration paths store username input without sanitization, and staff templates render it without HTML escaping. A user account and an agent who opens the User Lookup AJAX response are required; the script runs with the agent's browser privileges.

The record

CVE
CVE-2022-4271
Published
Dec 2, 2022
Updated
Apr 14, 2025
Vendor
Enhancesoft, LLC
Product
osTicket
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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=unspecified <1.16.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Enhancesoft, LLC · osTicketversion=unspecified <1.16.4

Published CVSS scores

8.0CVE CNA (@huntrdev)CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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