CVE-2022-39241Network attack vector

Internal host probing via insufficient outbound filtering

Published Nov 2, 2022 · Updated Apr 23, 2025

Server-side request forgery in Discourse 2.8.9 and earlier or 2.9.0.beta10 and earlier allows remote authenticated users to reach private hosts. Outbound handling for webhooks and theme repository clones fails to reject private IP destinations before issuing HTTP, SSH, or Git connections. End users can issue blind GET requests, while administrators can issue GET or POST requests, enumerate ports, and inspect limited response information.

CVSS severity7.6
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Discourse 2.8.9 and earlier or 2.9.0.beta10 and earlier allows remote authenticated users to reach private hosts. Outbound handling for webhooks and theme repository clones fails to reject private IP destinations before issuing HTTP, SSH, or Git connections. End users can issue blind GET requests, while administrators can issue GET or POST requests, enumerate ports, and inspect limited response information.

The record

CVE
CVE-2022-39241
Published
Nov 2, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-918, T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 2.8.9
  2. Affected versionversion=<= 2.9.0.beta10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=<= 2.8.9; version=<= 2.9.0.beta10

Published CVSS scores

4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
7.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Scanning

Public exploit references

No public exploit references are available in this record.

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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