CVE-2025-48489Public exploitNetwork attack vector

Administrator session theft via unsanitized mailbox name

Published May 30, 2025 · Updated May 30, 2025

Stored XSS in FreeScout before 1.8.180 allows remote authenticated users to steal administrator session data through a mailbox name. MailboxesController::updateSave() mass-assigns the submitted name without sanitizing it, while SystemController::ajaxHtml() returns failed-job content without HTML escaping. Exploitation requires mailbox-title edit permission, disabled CSP, and an administrator viewing affected job details or system status, where the injected JavaScript executes.

CVSS severity4.6
Medium
EPSS probability0.22%
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 FreeScout before 1.8.180 allows remote authenticated users to steal administrator session data through a mailbox name. MailboxesController::updateSave() mass-assigns the submitted name without sanitizing it, while SystemController::ajaxHtml() returns failed-job content without HTML escaping. Exploitation requires mailbox-title edit permission, disabled CSP, and an administrator viewing affected job details or system status, where the injected JavaScript executes.

The record

CVE
CVE-2025-48489
Published
May 30, 2025
Updated
May 30, 2025
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 30, 2025CVE publishedPublication date reported by the CVE source.
  2. May 30, 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=< 1.8.180

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.180

Published CVSS scores

4.6GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
4.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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