VDB-217537 · CVE-2022-23548 · GHSA-7rw2-f4x7-7pxf

Discourse up to 2.8.13/2.9.0.beta15 Post Parser cross site scripting

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.
4.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Discourse up to 2.8.13/2.9.0.beta15. It has been classified as problematic. Affected by this issue is some unknown functionality of the component Post Parser. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2022-23548. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Discourse up to 2.8.13/2.9.0.beta15. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component Post Parser. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 2.9.0.beta16 on the `beta` and `tests-passed` branches, parsing posts can be susceptible to XSS attacks. This issue is patched in versions 2.8.14 and 2.9.0.beta16. There are no known workarounds.

The weakness was disclosed 01/05/2023 as GHSA-7rw2-f4x7-7pxf. The advisory is shared at github.com. This vulnerability is known as CVE-2022-23548 since 01/19/2022. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.8.14 or 2.9.0.beta16 eliminates this vulnerability. Applying a patch 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.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2022-28566). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Discourse 2.8.14/2.9.0.beta16
Patch: github.com

Timelineinfo

01/19/2022 🔍
01/05/2023 +351 days 🔍
01/05/2023 +0 days 🔍
04/30/2026 +1211 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-7rw2-f4x7-7pxf
Status: Confirmed

CVE: CVE-2022-23548 (🔍)
GCVE (CVE): GCVE-0-2022-23548
GCVE (VulDB): GCVE-100-217537
EUVD: 🔍

Entryinfo

Created: 01/05/2023 22:31
Updated: 04/30/2026 07:01
Changes: 01/05/2023 22:31 (51), 04/30/2026 07:01 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.