CVE-2025-50340

MEDIUM

SOGo Webmail <5.6.0 - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-50340. PoCs published by millad7.

AI-analyzed exploit summary The repository provides a detailed technical analysis of CVE-2025-50340, an Insecure Direct Object Reference (IDOR) vulnerability in SOGo Webmail v5.6.0. It explains how an authenticated user can manipulate the 'from' parameter to send emails on behalf of another user, along with mitigation steps.

Description

An Insecure Direct Object Reference (IDOR) vulnerability was discovered in SOGo Webmail thru 5.6.0, allowing an authenticated user to send emails on behalf of other users by manipulating a user-controlled identifier in the email-sending request. The server fails to verify whether the authenticated user is authorized to use the specified sender identity, resulting in unauthorized message delivery as another user. This can lead to impersonation, phishing, or unauthorized communication within the system. NOTE: this is disputed by the Supplier because the only effective way to prevent this sender spoofing is on the SMTP server, not within a client such as SOGo.

Exploits (1)

nomisec WRITEUP
by millad7 · poc
https://github.com/millad7/SOGo_web_mail-vulnerability-CVE-2025-50340

The repository provides a detailed technical analysis of CVE-2025-50340, an Insecure Direct Object Reference (IDOR) vulnerability in SOGo Webmail v5.6.0. It explains how an authenticated user can manipulate the 'from' parameter to send emails on behalf of another user, along with mitigation steps.

Classification
Writeup 90%
Attack Type
Auth Bypass
Complexity
Trivial
Reliability
Reliable
Target: SOGo Webmail v5.6.0
Auth required
Prerequisites: Authenticated access to SOGo Webmail
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Scores

CVSS v3 4.3
EPSS 0.0030
EPSS Percentile 21.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-639
Status published
Published Aug 04, 2025
Tracked Since Feb 18, 2026