SB2023030108 - Multiple vulnerabilities in Discourse

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Main Vulnerability Database SB2023030108

SB2023030108 - Multiple vulnerabilities in Discourse

Published: March 1, 2023 Updated: July 1, 2026

Security Bulletin ID SB2023030108
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 25% Low 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2023-25819)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application within tags that are normally private. A remote attacker can gain unauthorized access to sensitive information on the system.


2) Server-Side Request Forgery (SSRF) (CVE-ID: CVE-2023-28112)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to trigger outbound network connections to private IP addresses from the server.

The vulnerability exists due to improper access control in FastImage requests when processing user-supplied URLs. A remote user can supply a crafted URL to trigger outbound network connections to private IP addresses from the server.

The issue affects some user-provided URLs that were passed to FastImage without SSRF protection.


3) Improper access control (CVE-ID: CVE-2023-28111)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper access control in SSRF protection for private IPv4 addresses when processing IPv4-mapped IPv6 addresses. A remote user can use an IPv4-mapped IPv6 address to disclose sensitive information.

User interaction is required.


4) Server-Side Request Forgery (SSRF) (CVE-ID: N/A)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to server-side request forgery in the WebPush gem HTTP client when sending push notifications. A remote attacker can cause the application to send crafted requests to disclose sensitive information.

User interaction is required.


Remediation

Install update from vendor's website.

References