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Vulnerability Details :

CVE-2026-33185

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-31 Mar, 2026 | 17:41
Updated At-01 Apr, 2026 | 13:47
Rejected At-
Credits

Discourse: Group SMTP test endpoint susceptible to SSRF

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the group email settings test endpoint could be used to make the server initiate outbound connections to arbitrary hosts and ports. This could allow probing of internal network infrastructure. The endpoint was accessible to non-staff group owners. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:31 Mar, 2026 | 17:41
Updated At:01 Apr, 2026 | 13:47
Rejected At:
â–¼CVE Numbering Authority (CNA)
Discourse: Group SMTP test endpoint susceptible to SSRF

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the group email settings test endpoint could be used to make the server initiate outbound connections to arbitrary hosts and ports. This could allow probing of internal network infrastructure. The endpoint was accessible to non-staff group owners. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Affected Products
Vendor
Civilized Discourse Construction Kit, Inc.discourse
Product
discourse
Versions
Affected
  • >= 2026.1.0-latest, < 2026.1.3
  • >= 2026.2.0-latest, < 2026.2.2
  • >= 2026.3.0-latest, < 2026.3.0
Problem Types
TypeCWE IDDescription
CWECWE-918CWE-918: Server-Side Request Forgery (SSRF)
Type: CWE
CWE ID: CWE-918
Description: CWE-918: Server-Side Request Forgery (SSRF)
Metrics
VersionBase scoreBase severityVector
4.05.3MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Version: 4.0
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://github.com/discourse/discourse/security/advisories/GHSA-5976-77mj-m4h3
x_refsource_CONFIRM
https://github.com/discourse/discourse/commit/e75cf456e8e318290c569bd6e8fa0f2586ffc530
x_refsource_MISC
Hyperlink: https://github.com/discourse/discourse/security/advisories/GHSA-5976-77mj-m4h3
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/discourse/discourse/commit/e75cf456e8e318290c569bd6e8fa0f2586ffc530
Resource:
x_refsource_MISC
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:31 Mar, 2026 | 18:16
Updated At:09 Apr, 2026 | 15:51

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the group email settings test endpoint could be used to make the server initiate outbound connections to arbitrary hosts and ports. This could allow probing of internal network infrastructure. The endpoint was accessible to non-staff group owners. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.05.3MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary3.15.0MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Type: Secondary
Version: 4.0
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Primary
Version: 3.1
Base score: 5.0
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
CPE Matches

Civilized Discourse Construction Kit, Inc.
discourse
>>discourse>>Versions from 2026.1.0(inclusive) to 2026.1.3(exclusive)
cpe:2.3:a:discourse:discourse:*:*:*:*:latest:*:*:*
Civilized Discourse Construction Kit, Inc.
discourse
>>discourse>>Versions from 2026.2.0(inclusive) to 2026.2.2(exclusive)
cpe:2.3:a:discourse:discourse:*:*:*:*:latest:*:*:*
Civilized Discourse Construction Kit, Inc.
discourse
>>discourse>>2026.3.0
cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest:*:*:*
Civilized Discourse Construction Kit, Inc.
discourse
>>discourse>>2026.3.0
cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest.1:*:*:*
Weaknesses
CWE IDTypeSource
CWE-918Primarysecurity-advisories@github.com
CWE ID: CWE-918
Type: Primary
Source: security-advisories@github.com
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://github.com/discourse/discourse/commit/e75cf456e8e318290c569bd6e8fa0f2586ffc530security-advisories@github.com
Patch
https://github.com/discourse/discourse/security/advisories/GHSA-5976-77mj-m4h3security-advisories@github.com
Vendor Advisory
Hyperlink: https://github.com/discourse/discourse/commit/e75cf456e8e318290c569bd6e8fa0f2586ffc530
Source: security-advisories@github.com
Resource:
Patch
Hyperlink: https://github.com/discourse/discourse/security/advisories/GHSA-5976-77mj-m4h3
Source: security-advisories@github.com
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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