CVE-2018-21259
MEDIUM
5.3
CVSS Score
Published: June 19, 2020 at 04:47 PM UTC
Updated: June 17, 2026 at 01:54 AM UTC
1 product affected across 1 vendorMattermost Server
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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
Description
An issue was discovered in Mattermost Server before 4.10.1, 4.9.4, and 4.8.2. It allows attackers to cause a denial of service (application hang) via a malformed link in a channel.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 4.8.24.10.0 ≤ v < 4.10.14.9.0 ≤ v < 4.9.4
Affected range stops below 4.10.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.8.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.9.4, 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
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- LOW
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-20
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