CVE-2025-48484Public exploitNetwork attack vector

Session data theft via stored conversation markup

Published May 30, 2025 · Updated May 30, 2025

Stored XSS in FreeScout before 1.8.178 allows remote authenticated users to steal browser-accessible data via edited conversation bodies. The conversation AJAX save path stores and renders attacker-supplied event-handler markup after relying on bypassable client-side tag filtering. Exploitation requires an authorized account, disabled CSP, and a separate user to view the affected conversation; the script runs within that user's session.

CVSS severity4.6
Medium
EPSS probability0.25%
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 1.8.178 allows remote authenticated users to steal browser-accessible data via edited conversation bodies. The conversation AJAX save path stores and renders attacker-supplied event-handler markup after relying on bypassable client-side tag filtering. Exploitation requires an authorized account, disabled CSP, and a separate user to view the affected conversation; the script runs within that user's session.

The record

CVE
CVE-2025-48484
Published
May 30, 2025
Updated
May 30, 2025
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-79, T1539
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=< 1.8.178

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.178

Published CVSS scores

4.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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 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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