App Rocket.Chat up to 3.8.7/3.9.6/3.10.4/3.10 Nested Markdown cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in App Rocket.Chat up to 3.8.7/3.9.6/3.10.4/3.10. The impacted element is an unknown function of the component Nested Markdown Handler. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2021-22886. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in App Rocket.Chat up to 3.8.7/3.9.6/3.10.4/3.10 (Chat Software). This issue affects an unknown functionality of the component Nested Markdown Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity.

The weakness was presented 03/27/2021. The advisory is shared at hackerone.com. The identification of this vulnerability is CVE-2021-22886. 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 3.8.8, 3.9.7, 3.10.5 or 3.11 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.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

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

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Rocket.Chat 3.8.8/3.9.7/3.10.5/3.11
Patch: github.com

Timelineinfo

01/06/2021 🔍
03/27/2021 +80 days 🔍
03/27/2021 +0 days 🔍
04/06/2021 +10 days 🔍

Sourcesinfo

Advisory: hackerone.com
Status: Confirmed

CVE: CVE-2021-22886 (🔍)
GCVE (CVE): GCVE-0-2021-22886
GCVE (VulDB): GCVE-100-171893

Entryinfo

Created: 03/27/2021 11:44
Updated: 04/06/2021 09:51
Changes: 03/27/2021 11:44 (40), 04/06/2021 09:45 (5), 04/06/2021 09:51 (18)
Complete: 🔍
Cache ID: 216::103

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