CVE-2018-21018
CRITICAL
9.8
CVSS Score
Published: September 22, 2019 at 02:22 PM UTC
Updated: June 17, 2026 at 01:53 AM UTC
1 product affected across 1 vendorMastodon
Using N/A by N/A?
Get instant alerts when new vulnerabilities affect N/A - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
CRITICAL9.8
Exploit prediction
EPSS 3%
Description
Mastodon before 2.6.3 mishandles timeouts of incompletely established sessions.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.6.3
Affected range stops below 2.6.3, 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 (4)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tootsuite/mastodon/pull/9329x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tootsuite/mastodon/pull/9381x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/tootsuite/mastodon/releases/tag/v2.6.2x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/tootsuite/mastodon/releases/tag/v2.6.3CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-613
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card