CVE-2025-41077Network attack vector

Account takeover via unauthorized user-record modification

Published Jan 12, 2026 · Updated Jan 12, 2026

Authorization bypass in Viafirma Inbox before 4.5.27 allows remote authenticated users to alter user data and impersonate accounts. The user-management interface accepts user references without verifying authorization to list, read, or update the referenced accounts. A low-privileged account can change another user's email address, invoke password recovery, and take over any account, including an administrator account.

CVSS severity8.6
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Viafirma Inbox before 4.5.27 allows remote authenticated users to alter user data and impersonate accounts. The user-management interface accepts user references without verifying authorization to list, read, or update the referenced accounts. A low-privileged account can change another user's email address, invoke password recovery, and take over any account, including an administrator account.

The record

CVE
CVE-2025-41077
Published
Jan 12, 2026
Updated
Jan 12, 2026
Vendor
Viafirma
Product
Viafirma Inbox
Classifications
CWE-639, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 12, 2026Record 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=v4.5.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Viafirma · Viafirma Inboxversion=v4.5.13

Published CVSS scores

8.6INCIBECVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-639Authorization Bypass Through User-Controlled Key
T1098Account Manipulation

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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