Mattermost Server up to 4.10.2/5.0.2/5.1.0 Signup permission assignment

entryeditHistoryDiffjsonxmlCTI
CVSS Meta Temp Score
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CTI Interest Score
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5.6$0-$5k0.00

A vulnerability classified as critical has been found in Mattermost Server up to 4.10.2/5.0.2/5.1.0. Affected is an unknown code block of the component Signup. The manipulation with an unknown input leads to a privilege escalation vulnerability. CWE is classifying the issue as CWE-732. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Mattermost Server before 5.2, 5.1.1, 5.0.3, and 4.10.3. Attackers could use multiple e-mail addresses to bypass a domain-based policy for signups.

The weakness was published 06/19/2020 (Website). The advisory is available at mattermost.com. This vulnerability is traded as CVE-2018-21252 since 06/19/2020. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 4.10.3, 5.0.3, 5.1.1 or 5.2 eliminates this vulnerability.

Similar entries are available at 156956, 156957, 156958 and 156959.

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CPE 2.3infoedit

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VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.3
NVD Vector: 🔒

CVSSv2infoedit

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-732
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Mattermost Server 4.10.3/5.0.3/5.1.1/5.2

Timelineinfoedit

06/19/2020 Advisory disclosed
06/19/2020 +0 days CVE assigned
06/21/2020 +2 days VulDB entry created
10/26/2020 +127 days VulDB last update

Sourcesinfoedit

Advisory: mattermost.com
Status: Not defined
Confirmation: 🔒

CVE: CVE-2018-21252 (🔒)
See also: 🔒

Entryinfoedit

Created: 06/21/2020 09:21 AM
Updated: 10/26/2020 07:33 AM
Changes: (1) advisory_confirm_url
Complete: 🔍

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