CVE-2023-28111

Discourse vulnerable to SSRF protection bypass possible with IPv4-mapped IPv6 addresses

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

Discourse is an open-source discussion platform. Prior to version 3.1.0.beta3 of the `beta` and `tests-passed` branches, attackers are able to bypass Discourse's server-side request forgery (SSRF) protection for private IPv4 addresses by using a IPv4-mapped IPv6 address. The issue is patched in the latest beta and tests-passed version of Discourse. version 3.1.0.beta3 of the `beta` and `tests-passed` branches. There are no known workarounds.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-03-10 CVE Reserved
2023-03-17 CVE Published
2025-02-25 CVE Updated
2025-04-15 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-918: Server-Side Request Forgery (SSRF)

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/discourse/discourse/commit/fd16eade7fcc6bba4b71e71106a2eb13cdfdae4a	2023-03-23
https://github.com/discourse/discourse/pull/20710	2023-03-23

URL	Date	SRC
https://github.com/discourse/discourse/security/advisories/GHSA-26h3-8ww8-v5fc	2023-03-23

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				< 3.1.0 Search vendor "Discourse" for product "Discourse" and version " < 3.1.0"		beta		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				3.1.0 Search vendor "Discourse" for product "Discourse" and version "3.1.0"		beta1, beta		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				3.1.0 Search vendor "Discourse" for product "Discourse" and version "3.1.0"		beta2, beta		Affected