CVE-2025-50340
An Insecure Direct Object Reference (IDOR) vulnerability was discovered in SOGo Webmail thru 5.6...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
4.3
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.
- Record
CVE-2025-50340- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
EUVDEUVD-2025-23544
4.3
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.
- Record
EUVD-2025-23544- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-2397-fjxq-4xvj
4.3
An Insecure Direct Object Reference (IDOR) vulnerability was discovered in SOGo Webmail thru 5.6...
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.
- Record
GHSA-2397-fjxq-4xvj- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
NVD
4.3
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.
- Record
CVE-2025-50340- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-639
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2025-50340
4.3
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.
- Record
UBUNTU-CVE-2025-50340- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-03
OSV No score
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.
- Record
CVE-2025-50340- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
sogoUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.2.17a-12.2.17a-1.12.2.17a-1.1build12.2.17a-1.1ubuntu0.1~esm1 |
None known |
sogoUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 3.2.10-13.2.10-1build13.2.10-1ubuntu0.1~esm1 |
None known |
sogoUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 4.0.8-14.1.0-14.1.1-14.3.0-14.3.0-1ubuntu0.1~esm1 |
None known |
sogoUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 5.1.0-15.2.0-15.2.0-35.3.0-15.3.0-1build2 Show 4 moreShow less5.4.0-15.5.0-15.5.1-15.5.1-1ubuntu0.1~esm1 |
None known |
sogoUbuntu:25.10 |
All versions, plus listed versions 5.11.2-45.12.1-15.12.1-1build25.12.1-25.12.1-3 |
None known |
sogoUbuntu:26.10 |
All versions, plus listed versions 5.12.4-1.25.12.8-25.12.9-15.12.10-1ubuntu1 |
None known |
sogoUbuntu:Pro:26.04:LTS |
All versions, plus listed versions 5.12.1-35.12.4-15.12.4-1.15.12.4-1.25.12.4-1.2ubuntu0.1~esm15.12.4-1.2ubuntu0.1~esm2 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | millad7/SOGo_web_mail-vulnerability-CVE-2025-50340 | 2025-07-31 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | OSV | |
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-50340 is a medium vulnerability (CVSS 4.3) in sogo, published August 4, 2025. Its validity is disputed. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 33rd percentile.
References
sogo.nu
github.com/millad7/SOGo_web_mail-vulnerability-CVE-2025-50340
mail-archive.com/users%40sogo.nu/msg34098.html
bugs.debian.org/cgi-bin/bugreport.cgi?bug=1110604
nvd.nist.gov/vuln/detail/CVE-2025-50340
github.com/advisories/GHSA-2397-fjxq-4xvj
security-tracker.debian.org/tracker/CVE-2025-50340
ubuntu.com/security/CVE-2025-50340
cve.org/CVERecord?id=CVE-2025-50340