VDB-217534 · CVE-2023-22453 · GHSA-xx97-6494-p2rv

Discourse up to 2.8.13/3.0.0.beta15 /u/username.json information disclosure

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Discourse up to 2.8.13/3.0.0.beta15. This impacts an unknown function of the file /u/username.json. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2023-22453. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Discourse up to 2.8.13/3.0.0.beta15 and classified as problematic. This vulnerability affects some unknown functionality of the file /u/username.json. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 3.0.0.beta16 on the `beta` and `tests-passed` branches, the number of times a user posted in an arbitrary topic is exposed to unauthorized users through the `/u/username.json` endpoint. The issue is patched in version 2.8.14 and 3.0.0.beta16. There is no known workaround.

The weakness was shared 01/05/2023 as GHSA-xx97-6494-p2rv. The advisory is available at github.com. This vulnerability was named CVE-2023-22453 since 12/29/2022. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

By approaching the search of inurl:u/username.json it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.8.14 or 3.0.0.beta16 eliminates this vulnerability. Applying the patch cbcf8a064b4889a19c991641e09c399bfa1ef2ad is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Chat Software

Name

Discourse

Version

License

open-source

Website

Product: https://github.com/discourse/discourse/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Discourse 2.8.14/3.0.0.beta16
Patch: cbcf8a064b4889a19c991641e09c399bfa1ef2ad

Timelineinfo

12/29/2022 🔍
01/05/2023 +7 days 🔍
01/05/2023 +0 days 🔍
01/29/2023 +24 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-xx97-6494-p2rv
Status: Confirmed

CVE: CVE-2023-22453 (🔍)
GCVE (CVE): GCVE-0-2023-22453
GCVE (VulDB): GCVE-100-217534

Entryinfo

Created: 01/05/2023 22:30
Updated: 01/29/2023 08:50
Changes: 01/05/2023 22:30 (42), 01/29/2023 08:50 (12)
Complete: 🔍
Cache ID: 216::103