CVE-2018-21252

MEDIUM
4.3
CVSS Score
Published: June 19, 2020 at 05:44 PM UTC
Updated: June 17, 2026 at 01:54 AM UTC
1 product affected across 1 vendorMattermost Server

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.10.35.0.0 ≤ v < 5.0.35.1.0 ≤ v < 5.1.15.2.0 rc15.2.0 rc25.2.0 rc35.2.0 rc45.2.0 rc55.2.0 rc6
Affected range stops below 4.10.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
https://mattermost.com/security-updates/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-732

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