CVE-2019-20844
MEDIUM
6.5
CVSS Score
Published: June 19, 2020 at 01:26 PM UTC
Updated: June 17, 2026 at 02:31 AM UTC
1 product affected across 1 vendorMattermost Server
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
Description
An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. An attacker can spoof a direct-message channel by changing the type of a channel.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 5.9.75.15.0 ≤ v < 5.15.45.16.0 ≤ v < 5.16.45.17.0 ≤ v < 5.17.25.18.0 rc15.18.0 rc25.18.0 rc35.18.0 rc4
Affected range stops below 5.15.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.16.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.17.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.9.7, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-924
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