CVE-2025-48477Public exploitNetwork attack vector

Authenticated mailbox overwrite via unrestricted mass assignment

Published May 30, 2025 · Updated May 30, 2025

Mass assignment in FreeScout before 1.8.180 allows remote authenticated users to overwrite mailbox settings through crafted requests. MailboxController validates only the expected form fields but passes the entire request to Mailbox.fill(), which accepts every attribute in the model allowlist. A user with signature, mailbox-edit, or auto-reply rights can alter unrelated connection, credential, identity, routing, and message fields.

CVSS severity7.1
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Mass assignment in FreeScout before 1.8.180 allows remote authenticated users to overwrite mailbox settings through crafted requests. MailboxController validates only the expected form fields but passes the entire request to Mailbox.fill(), which accepts every attribute in the model allowlist. A user with signature, mailbox-edit, or auto-reply rights can alter unrelated connection, credential, identity, routing, and message fields.

The record

CVE
CVE-2025-48477
Published
May 30, 2025
Updated
May 30, 2025
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-841, T1565.001
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

7.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA: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-841Improper Enforcement of Behavioral Workflow
T1565.001Stored Data Manipulation

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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