VDB-187452 · CVE-2021-43794 · GHSA-249g-pc77-65hp

Discourse HTML Page external reference

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.
5.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Discourse. It has been declared as problematic. Affected by this issue is some unknown functionality of the component HTML Page Handler. The manipulation results in external reference. This vulnerability is reported as CVE-2021-43794. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in Discourse (version now known). Affected is some unknown processing of the component HTML Page Handler. The manipulation with an unknown input leads to a external reference vulnerability. CWE is classifying the issue as CWE-610. The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere. This is going to have an impact on integrity, and availability.

The weakness was disclosed 12/02/2021 as GHSA-249g-pc77-65hp. The advisory is shared for download at github.com. This vulnerability is traded as CVE-2021-43794 since 11/16/2021. There are neither technical details nor an exploit publicly available.

Applying the patch 2da0001965c6d8632d723c46ea5df9f22a1a23f1 is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Chat Software

Name

Discourse

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: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: External reference
CWE: CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 2da0001965c6d8632d723c46ea5df9f22a1a23f1

Timelineinfo

11/16/2021 🔍
12/02/2021 +16 days 🔍
12/02/2021 +0 days 🔍
12/08/2021 +6 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-249g-pc77-65hp
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-43794 (🔍)
GCVE (CVE): GCVE-0-2021-43794
GCVE (VulDB): GCVE-100-187452

Entryinfo

Created: 12/02/2021 08:00
Updated: 12/08/2021 13:38
Changes: 12/02/2021 08:00 (49), 12/08/2021 13:33 (2), 12/08/2021 13:38 (7)
Complete: 🔍
Cache ID: 216::103