Discourse up to 2.8.13/2.9.0.beta14 Comment denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Discourse up to 2.8.13/2.9.0.beta14. The impacted element is an unknown function of the component Comment Handler. Such manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2022-23549. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Discourse up to 2.8.13/2.9.0.beta14. Affected by this issue is an unknown function of the component Comment Handler. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 2.9.0.beta15 on the `beta` and `tests-passed` branches, users can create posts with raw body longer than the `max_length` site setting by including html comments that are not counted toward the character limit. 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-p47g-v5wr-p4xp. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2022-23549 since 01/19/2022. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 2.8.14 or 2.9.0.beta15 eliminates this vulnerability. Applying the patch bf6b08670a927cc80bb090b7a2e710b4b554e6a8 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-2022-28567). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 5.7
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Discourse 2.8.14/2.9.0.beta15
Patch: bf6b08670a927cc80bb090b7a2e710b4b554e6a8

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-p47g-v5wr-p4xp
Status: Confirmed

CVE: CVE-2022-23549 (🔍)
GCVE (CVE): GCVE-0-2022-23549
GCVE (VulDB): GCVE-100-217532
EUVD: 🔍

Entryinfo

Created: 01/05/2023 22:29
Updated: 04/30/2026 07:40
Changes: 01/05/2023 22:29 (42), 01/29/2023 08:48 (21), 04/30/2026 07:40 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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